Fix: Allow DRF to validate the maximum API key length (#13614)

* feat: add unified PermittedObjectsFilter backed by permitted_object_ids

* refactor: migrate all ViewSets to unified PermittedObjectsFilter

Replace the deprecated ObjectOwnedOrGrantedPermissionsFilter,
DocumentPermissionsFilter, and ObjectOwnedPermissionsFilter aliases
with PermittedObjectsFilter directly across documents/views.py (8
sites, including TrashView's include_granted=False subclass) and
paperless_mail/views.py (3 sites), then delete the now-unreferenced
alias classes from documents/filters.py.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UFyrt7FWbRRdTUAcdqBcsc

* docs: document legacy status of get_objects_for_user_owner_aware/has_perms_owner_aware

Stage 4's PermittedObjectsFilter/permitted_object_ids() covers the
queryset-filtering use case, but both functions still have production
callers outside this plan's scope (documents/views.py,
documents/serialisers.py, documents/signals/handlers.py,
paperless_ai/matching.py, paperless_ai/ai_classifier.py). Per Task 20
Step 2, they are kept in place rather than partially deleted, with
docstrings updated to note their legacy status and remaining callers.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UFyrt7FWbRRdTUAcdqBcsc

* Fix: address final review findings for permission-filter unification

- Add a permanent regression test pinning TrashView's include_granted=False
  wiring: an explicit view_document grant on a trashed document must not
  leak it into /api/trash/ for a non-owner, non-superuser requester.
- Drop the now-dead direct dependency djangorestframework-guardian; the
  last rest_framework_guardian import was removed by this branch's
  migration onto PermittedObjectsFilter. django-guardian is untouched.
- Replace the hand-maintained, already-stale caller lists in
  get_objects_for_user_owner_aware/has_perms_owner_aware docstrings with a
  pointer to grep for remaining callers instead.
- In PermittedObjectsFilter.filter_queryset, compute `model` only on the
  include_granted=True path that actually uses it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UFyrt7FWbRRdTUAcdqBcsc

* perf: check bulk-edit-objects apply_to_all permissions via DB-side exclude/exists

Materialized the full permitted_object_ids() set into a Python set() just
to check membership for the request's objs queryset -- the same pattern
already fixed at four other sites for Document. This one is used by
apply_to_all, where objs can be an unbounded filtered selection (e.g. all
tags matching a filter) rather than a small request-supplied ID list,
making the wasted materialization worse here than at the sites already
fixed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* Cleans up the comment about why this is still here for now

---------

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

pyproject.toml

@@ -38,7 +38,6 @@ dependencies = [
   "django-soft-delete~=1.0.18",
   "django-treenode>=0.24",
   "djangorestframework~=3.16",
-  "djangorestframework-guardian~=0.4.0",
   "drf-spectacular~=0.30",
   "drf-spectacular-sidecar~=2026.7.1",
   "drf-writable-nested~=0.7.1",

src-ui/src/app/components/common/pdf-viewer/pdf-viewer.component.scss

@@ -151,6 +151,13 @@
   inset: 0;
   pointer-events: none;
 
+  & section {
+    position: absolute;
+    text-align: initial;
+    box-sizing: border-box;
+    transform-origin: 0 0;
+  }
+
   & .annotationTextContent {
     opacity: 0;
   }

src-ui/src/app/components/common/pdf-viewer/pdf-viewer.component.ts

@@ -13,6 +13,7 @@ import {
   ViewChild,
 } from '@angular/core'
 import {
+  AnnotationMode,
   getDocument,
   GlobalWorkerOptions,
   PDFDocumentLoadingTask,
@@ -221,6 +222,7 @@ export class PngxPdfViewerComponent
       linkService: this.linkService,
       findController: this.findController,
       textLayerMode,
+      annotationMode: AnnotationMode.ENABLE,
       enableSelectionRendering: false,
       removePageBorders: true,
     }

src-ui/src/app/components/manage/document-attributes/management-list/management-list.component.html

@@ -88,7 +88,7 @@
       @if (depth > 0) {
         <div class="indicator"></div>
       }
-      <button class="btn btn-link ms-0 ps-0 text-start" style="user-select: text;" (click)="userCanEdit(object) ? openEditDialog(object) : null; $event.stopPropagation()">{{ object.name }}</button>
+      <button class="btn btn-link ms-0 ps-0 text-start" style="user-select: text;" [disabled]="!userCanEdit(object)" (click)="userCanEdit(object) ? openEditDialog(object) : null; $event.stopPropagation()">{{ object.name }}</button>
     </td>
     <td class="d-none d-sm-table-cell">{{ getMatching(object) }}</td>
     <td>{{ getDocumentCount(object) }}</td>

src-ui/src/test/mocks/pdfjs-legacy-build-pdf.ts

@@ -19,6 +19,13 @@ export const GlobalWorkerOptions = {
   workerSrc: '',
 }
 
+export const AnnotationMode = {
+  DISABLE: 0,
+  ENABLE: 1,
+  ENABLE_FORMS: 2,
+  ENABLE_STORAGE: 3,
+}
+
 export const getDocument = (_src: unknown): PDFDocumentLoadingTask => {
   return new PDFDocumentLoadingTask(Promise.resolve(new PDFDocumentProxy()))
 }

src/documents/filters.py

@@ -39,7 +39,6 @@ from guardian.utils import get_user_obj_perms_model
 from rest_framework import serializers
 from rest_framework.filters import BaseFilterBackend
 from rest_framework.filters import OrderingFilter
-from rest_framework_guardian.filters import ObjectPermissionsFilter
 
 from documents.models import Correspondent
 from documents.models import CustomField
@@ -51,7 +50,7 @@ from documents.models import ShareLink
 from documents.models import ShareLinkBundle
 from documents.models import StoragePath
 from documents.models import Tag
-from documents.permissions import permitted_document_ids
+from documents.permissions import permitted_object_ids
 
 if TYPE_CHECKING:
     from collections.abc import Callable
@@ -1028,59 +1027,35 @@ class PaperlessTaskFilterSet(FilterSet):
         return queryset.exclude(status__in=PaperlessTask.COMPLETE_STATUSES)
 
 
-class ObjectOwnedOrGrantedPermissionsFilter(ObjectPermissionsFilter):
+class PermittedObjectsFilter(BaseFilterBackend):
     """
-    A filter backend that limits results to those where the requesting user
-    has read object level permissions, owns the objects, or objects without
-    an owner (for backwards compat)
+    Filters a queryset down to objects the requesting user owns, are
+    unowned, or (when ``include_granted`` is True) has an explicit
+    user/group guardian permission on. Backed by ``permitted_object_ids``
+    -- a single ``id__in`` subquery, not a join -- so it can't produce
+    duplicate rows even when the base queryset already carries independent
+    joins (e.g. multi-value ``tags__id__all`` filtering), and stays
+    index-friendly at scale instead of falling back to guardian's
+    varchar-cast join.
+
+    Set ``include_granted = False`` on a subclass for endpoints that
+    intentionally only show owned/unowned objects regardless of explicit
+    shares (e.g. ``TrashView``).
     """
 
+    include_granted: bool = True
+    perm_codename: str | None = None
+
     def filter_queryset(self, request, queryset, view):
         if request.user.is_superuser:
             return queryset
-        objects_with_perms = super().filter_queryset(request, queryset, view)
-        objects_owned = queryset.filter(owner=request.user)
-        objects_unowned = queryset.filter(owner__isnull=True)
-        return objects_with_perms | objects_owned | objects_unowned
-
-
-class DocumentPermissionsFilter(BaseFilterBackend):
-    """
-    A filter backend limiting Document results to those the requesting user
-    owns, are unowned, or has explicit (user- or group-level) view
-    permission on.
-
-    Unlike ``ObjectOwnedOrGrantedPermissionsFilter``, this does not build an
-    ``objects_with_perms | objects_owned | objects_unowned`` union of
-    querysets derived from the same base queryset. When that base queryset
-    already carries independent joins on a multi-valued relation (e.g. two
-    separate joins from ``tags__id__all`` filtering on two tags), each
-    OR-ed branch can end up pairing those joins' aliases differently,
-    letting more than one row out of the join's cross product satisfy the
-    combined WHERE -- returning the same document more than once. Filtering
-    via a single ``id__in`` against ``permitted_document_ids`` (a plain
-    subquery, not a join) sidesteps that entirely and is also cheaper than
-    guardian's join-based permission check.
-    """
-
-    def filter_queryset(self, request, queryset, view):
-        if request.user.is_superuser:
-            return queryset
-        return queryset.filter(id__in=permitted_document_ids(request.user))
-
-
-class ObjectOwnedPermissionsFilter(ObjectPermissionsFilter):
-    """
-    A filter backend that limits results to those where the requesting user
-    owns the objects or objects without an owner (for backwards compat)
-    """
-
-    def filter_queryset(self, request, queryset, view):
-        if request.user.is_superuser:
-            return queryset
-        objects_owned = queryset.filter(owner=request.user)
-        objects_unowned = queryset.filter(owner__isnull=True)
-        return objects_owned | objects_unowned
+        if not self.include_granted:
+            return queryset.filter(Q(owner=request.user) | Q(owner__isnull=True))
+        model = queryset.model
+        perm = self.perm_codename or f"view_{model._meta.model_name}"
+        return queryset.filter(
+            id__in=permitted_object_ids(request.user, model, perm),
+        )
 
 
 class DocumentsOrderingFilter(OrderingFilter):

src/documents/matching.py

@@ -19,7 +19,7 @@ from documents.models import StoragePath
 from documents.models import Tag
 from documents.models import Workflow
 from documents.models import WorkflowTrigger
-from documents.permissions import get_objects_for_user_owner_aware
+from documents.permissions import permitted_object_ids
 from documents.regex import safe_regex_search
 
 if TYPE_CHECKING:
@@ -55,10 +55,8 @@ def match_correspondents(document: Document, classifier: DocumentClassifier, use
         user = document.owner
 
     if user is not None:
-        correspondents = get_objects_for_user_owner_aware(
-            user,
-            "documents.view_correspondent",
-            Correspondent,
+        correspondents = Correspondent.objects.filter(
+            id__in=permitted_object_ids(user, Correspondent, "view_correspondent"),
         )
     else:
         correspondents = Correspondent.objects.all()
@@ -86,10 +84,8 @@ def match_document_types(document: Document, classifier: DocumentClassifier, use
         user = document.owner
 
     if user is not None:
-        document_types = get_objects_for_user_owner_aware(
-            user,
-            "documents.view_documenttype",
-            DocumentType,
+        document_types = DocumentType.objects.filter(
+            id__in=permitted_object_ids(user, DocumentType, "view_documenttype"),
         )
     else:
         document_types = DocumentType.objects.all()
@@ -116,7 +112,9 @@ def match_tags(document: Document, classifier: DocumentClassifier, user=None):
         user = document.owner
 
     if user is not None:
-        tags = get_objects_for_user_owner_aware(user, "documents.view_tag", Tag)
+        tags = Tag.objects.filter(
+            id__in=permitted_object_ids(user, Tag, "view_tag"),
+        )
     else:
         tags = Tag.objects.all()
 
@@ -145,10 +143,8 @@ def match_storage_paths(document: Document, classifier: DocumentClassifier, user
         user = document.owner
 
     if user is not None:
-        storage_paths = get_objects_for_user_owner_aware(
-            user,
-            "documents.view_storagepath",
-            StoragePath,
+        storage_paths = StoragePath.objects.filter(
+            id__in=permitted_object_ids(user, StoragePath, "view_storagepath"),
         )
     else:
         storage_paths = StoragePath.objects.all()

src/documents/permissions.py

@@ -7,6 +7,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.db.models import Case
 from django.db.models import Count
 from django.db.models import IntegerField
+from django.db.models import Model
 from django.db.models import Q
 from django.db.models import QuerySet
 from django.db.models import Value
@@ -163,30 +164,32 @@ def set_permissions_for_object(
                         )
 
 
-def permitted_document_ids(
-    user,
+def permitted_object_ids(
+    user: User | None,
+    model: type[Model],
+    perm: str,
     *,
-    perm: str = "view_document",
     include_deleted: bool = False,
-):
+) -> QuerySet[int]:
     """
-    Return a queryset of document IDs the user has ``perm`` on (default
-    ``"view_document"``). By default limited to non-deleted documents; pass
-    ``include_deleted=True`` for callers that need to check permission on
-    soft-deleted documents (e.g. trash restore). This intentionally avoids
-    ``get_objects_for_user`` to keep the subquery small and index-friendly.
+    Generic version of ``permitted_document_ids`` for any model with an
+    ``owner`` field and guardian object-level permissions. ``include_deleted``
+    only has an effect for models exposing a ``global_objects``/``deleted_at``
+    soft-delete pattern (currently only ``Document``); for every other model
+    it is accepted but has no effect, since those models have no soft-delete
+    concept.
     """
-
-    manager = Document.global_objects if include_deleted else Document.objects
-    base_docs = manager.all()
-    base_docs = base_docs.only("id", "owner")
+    has_soft_delete = hasattr(model, "global_objects")
+    manager = (
+        model.global_objects if include_deleted and has_soft_delete else model.objects
+    )
+    base_qs = manager.all().only("id", "owner")
 
     if user is None or not getattr(user, "is_authenticated", False):
-        # Just Anonymous user e.g. for drf-spectacular
-        return base_docs.filter(owner__isnull=True).values_list("id", flat=True)
+        return base_qs.filter(owner__isnull=True).values_list("id", flat=True)
 
     if getattr(user, "is_superuser", False):
-        return base_docs.values_list("id", flat=True)
+        return base_qs.values_list("id", flat=True)
 
     # Guardian's UserObjectPermission/GroupObjectPermission always store a bare
     # codename, but has_perm()-style callers commonly pass the qualified
@@ -194,31 +197,46 @@ def permitted_document_ids(
     # codename, so just drop any prefix rather than silently under-permitting.
     perm = perm.rsplit(".", 1)[-1]
 
-    document_ct = ContentType.objects.get_for_model(Document)
+    content_type = ContentType.objects.get_for_model(model)
     perm_filter = {
         "permission__codename": perm,
-        "permission__content_type": document_ct,
+        "permission__content_type": content_type,
     }
 
-    user_perm_docs = (
+    user_perm_ids = (
         UserObjectPermission.objects.filter(user=user, **perm_filter)
         .annotate(object_pk_int=Cast("object_pk", IntegerField()))
         .values_list("object_pk_int", flat=True)
     )
-
-    group_perm_docs = (
+    group_perm_ids = (
         GroupObjectPermission.objects.filter(group__user=user, **perm_filter)
         .annotate(object_pk_int=Cast("object_pk", IntegerField()))
         .values_list("object_pk_int", flat=True)
     )
+    permitted_ids = user_perm_ids.union(group_perm_ids)
 
-    permitted_documents = user_perm_docs.union(group_perm_docs)
-
-    return base_docs.filter(
-        Q(owner=user) | Q(owner__isnull=True) | Q(id__in=permitted_documents),
+    return base_qs.filter(
+        Q(owner=user) | Q(owner__isnull=True) | Q(id__in=permitted_ids),
     ).values_list("id", flat=True)
 
 
+def permitted_document_ids(
+    user: User | None,
+    *,
+    perm: str = "view_document",
+    include_deleted: bool = False,
+) -> QuerySet[int]:
+    """
+    Document-specific convenience wrapper around ``permitted_object_ids``.
+    Return a queryset of document IDs the user has ``perm`` on (default
+    ``"view_document"``). By default limited to non-deleted documents; pass
+    ``include_deleted=True`` for callers that need to check permission on
+    soft-deleted documents (e.g. trash restore). This intentionally avoids
+    ``get_objects_for_user`` to keep the subquery small and index-friendly.
+    """
+    return permitted_object_ids(user, Document, perm, include_deleted=include_deleted)
+
+
 def get_document_count_filter_for_user(user, related_name: str = "documents"):
     """
     Return the Q object used to filter document counts for the given user.
@@ -341,6 +359,13 @@ def get_objects_for_user_owner_aware(
     """
     Returns objects the user owns, are unowned, or has explicit perms.
     When include_deleted is True, soft-deleted items are also included.
+
+    Legacy slow path (guardian-backed, O(n) style permission resolution).
+    Most queryset-filtering call sites have migrated onto
+    ``PermittedObjectsFilter``/``permitted_object_ids()``, but this function
+    is kept because production callers still remain. Several callers remain
+    across ``documents/``, ``paperless_mail/``, and ``paperless_ai/`` --
+    grep for this function name before removing it.
     """
     manager = (
         Model.global_objects
@@ -360,6 +385,15 @@ def get_objects_for_user_owner_aware(
 
 
 def has_perms_owner_aware(user, perms, obj):
+    """
+    Legacy slow path (guardian-backed) single-object permission check.
+
+    The queryset-filtering side of this migrated onto
+    ``PermittedObjectsFilter``/``permitted_object_ids()``, but this
+    single-object check still has many production callers. Several callers
+    remain across ``documents/``, ``paperless_mail/``, and ``paperless_ai/``
+    -- grep for this function name before removing it.
+    """
     checker = ObjectPermissionChecker(user)
     return obj.owner is None or obj.owner == user or checker.has_perm(perms, obj)
 

src/documents/tests/test_permission_filtering_security.py

@@ -12,9 +12,22 @@ from django.test import override_settings
 from guardian.shortcuts import assign_perm
 from rest_framework.test import APIClient
 
+from documents.matching import match_correspondents
+from documents.matching import match_document_types
+from documents.matching import match_storage_paths
+from documents.matching import match_tags
+from documents.models import Correspondent
+from documents.models import DocumentType
+from documents.models import StoragePath
+from documents.models import Tag
 from documents.permissions import permitted_document_ids
+from documents.permissions import permitted_object_ids
 from documents.serialisers import _get_viewable_duplicates
+from documents.tests.factories import CorrespondentFactory
 from documents.tests.factories import DocumentFactory
+from documents.tests.factories import DocumentTypeFactory
+from documents.tests.factories import StoragePathFactory
+from documents.tests.factories import TagFactory
 
 
 def assert_visible_document_ids(actual_ids, *, expected_visible, expected_hidden):
@@ -431,3 +444,320 @@ class TestTrashRestorePermissionBoundary:
             format="json",
         )
         assert response.status_code == HTTPStatus.OK
+
+
+@pytest.mark.django_db
+class TestTrashViewExcludesExplicitlyGrantedDocuments:
+    """
+    Regression test pinning TrashView's use of
+    ``_TrashPermittedObjectsFilter`` (``include_granted = False``). If that
+    flag were ever flipped to the default ``True``, or the subclass removed
+    in favor of the base ``PermittedObjectsFilter``, a trashed document
+    would leak into ``/api/trash/`` results for any user holding an
+    explicit guardian grant on it, even though they are neither the owner
+    nor a superuser.
+    """
+
+    def test_explicit_grant_does_not_leak_trashed_document(self, rest_api_client):
+        owner = User.objects.create_user(username="trash_owner")
+        grantee = User.objects.create_user(username="trash_grantee")
+        doc = DocumentFactory(owner=owner)
+        doc.delete()  # soft delete
+        assign_perm("view_document", grantee, doc)
+
+        rest_api_client.force_authenticate(user=grantee)
+        response = rest_api_client.get("/api/trash/")
+
+        assert response.status_code == HTTPStatus.OK
+        result_ids = {result["id"] for result in response.data["results"]}
+        assert doc.pk not in result_ids
+
+
+@pytest.mark.django_db
+@pytest.mark.parametrize(
+    ("model", "factory", "perm"),
+    [
+        (Tag, TagFactory, "view_tag"),
+        (Correspondent, CorrespondentFactory, "view_correspondent"),
+        (DocumentType, DocumentTypeFactory, "view_documenttype"),
+        (StoragePath, StoragePathFactory, "view_storagepath"),
+    ],
+)
+class TestPermittedObjectIdsGenericModels:
+    def test_owner_sees_own_object(self, model, factory, perm):
+        owner = User.objects.create_user(username=f"owner_{model.__name__}")
+        stranger = User.objects.create_user(username=f"stranger_{model.__name__}")
+        owned = factory(owner=owner)
+        strangers = factory(owner=stranger)
+
+        assert_visible_document_ids(
+            permitted_object_ids(owner, model, perm),
+            expected_visible=[owned.pk],
+            expected_hidden=[strangers.pk],
+        )
+
+    def test_unowned_object_visible_to_everyone(self, model, factory, perm):
+        user = User.objects.create_user(username=f"user_{model.__name__}")
+        unowned = factory(owner=None)
+
+        assert_visible_document_ids(
+            permitted_object_ids(user, model, perm),
+            expected_visible=[unowned.pk],
+            expected_hidden=[],
+        )
+
+    def test_explicit_permission_grants_visibility(self, model, factory, perm):
+        owner = User.objects.create_user(username=f"owner2_{model.__name__}")
+        grantee = User.objects.create_user(username=f"grantee_{model.__name__}")
+        stranger = User.objects.create_user(username=f"stranger2_{model.__name__}")
+        shared = factory(owner=owner)
+        not_shared = factory(owner=owner)
+        assign_perm(perm, grantee, shared)
+
+        assert_visible_document_ids(
+            permitted_object_ids(grantee, model, perm),
+            expected_visible=[shared.pk],
+            expected_hidden=[not_shared.pk],
+        )
+        assert_visible_document_ids(
+            permitted_object_ids(stranger, model, perm),
+            expected_visible=[],
+            expected_hidden=[shared.pk, not_shared.pk],
+        )
+
+    def test_group_permission_grants_visibility_to_members_only(
+        self,
+        model,
+        factory,
+        perm,
+    ):
+        owner = User.objects.create_user(username=f"owner3_{model.__name__}")
+        member = User.objects.create_user(username=f"member_{model.__name__}")
+        non_member = User.objects.create_user(username=f"nonmember_{model.__name__}")
+        group = Group.objects.create(name=f"group_{model.__name__}")
+        member.groups.add(group)
+        shared = factory(owner=owner)
+        assign_perm(perm, group, shared)
+
+        assert_visible_document_ids(
+            permitted_object_ids(member, model, perm),
+            expected_visible=[shared.pk],
+            expected_hidden=[],
+        )
+        assert_visible_document_ids(
+            permitted_object_ids(non_member, model, perm),
+            expected_visible=[],
+            expected_hidden=[shared.pk],
+        )
+
+    def test_superuser_sees_everything(self, model, factory, perm):
+        superuser = User.objects.create_superuser(username=f"root_{model.__name__}")
+        owner = User.objects.create_user(username=f"owner4_{model.__name__}")
+        obj = factory(owner=owner)
+
+        assert_visible_document_ids(
+            permitted_object_ids(superuser, model, perm),
+            expected_visible=[obj.pk],
+            expected_hidden=[],
+        )
+
+
+@pytest.mark.django_db
+class TestMatchingRespectsObjectPermissions:
+    def test_match_tags_only_considers_tags_visible_to_user(self):
+        owner = User.objects.create_user(username="tag_owner")
+        classifying_user = User.objects.create_user(username="classifier_user")
+        visible_tag = TagFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=Tag.MATCH_LITERAL,
+        )
+        hidden_tag = TagFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=Tag.MATCH_LITERAL,
+        )
+        assign_perm("view_tag", classifying_user, visible_tag)
+        doc = DocumentFactory(owner=classifying_user, content="an invoice document")
+
+        matched = match_tags(doc, classifier=None, user=classifying_user)
+        matched_ids = {t.pk for t in matched}
+        assert visible_tag.pk in matched_ids
+        assert hidden_tag.pk not in matched_ids
+
+    def test_match_correspondents_only_considers_correspondents_visible_to_user(self):
+        owner = User.objects.create_user(username="correspondent_owner")
+        classifying_user = User.objects.create_user(username="classifier_user2")
+        visible_correspondent = CorrespondentFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=Correspondent.MATCH_LITERAL,
+        )
+        hidden_correspondent = CorrespondentFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=Correspondent.MATCH_LITERAL,
+        )
+        assign_perm("view_correspondent", classifying_user, visible_correspondent)
+        doc = DocumentFactory(owner=classifying_user, content="an invoice document")
+
+        matched = match_correspondents(doc, classifier=None, user=classifying_user)
+        matched_ids = {c.pk for c in matched}
+        assert visible_correspondent.pk in matched_ids
+        assert hidden_correspondent.pk not in matched_ids
+
+    def test_match_document_types_only_considers_document_types_visible_to_user(self):
+        owner = User.objects.create_user(username="document_type_owner")
+        classifying_user = User.objects.create_user(username="classifier_user3")
+        visible_document_type = DocumentTypeFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=DocumentType.MATCH_LITERAL,
+        )
+        hidden_document_type = DocumentTypeFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=DocumentType.MATCH_LITERAL,
+        )
+        assign_perm("view_documenttype", classifying_user, visible_document_type)
+        doc = DocumentFactory(owner=classifying_user, content="an invoice document")
+
+        matched = match_document_types(doc, classifier=None, user=classifying_user)
+        matched_ids = {dt.pk for dt in matched}
+        assert visible_document_type.pk in matched_ids
+        assert hidden_document_type.pk not in matched_ids
+
+    def test_match_storage_paths_only_considers_storage_paths_visible_to_user(self):
+        owner = User.objects.create_user(username="storage_path_owner")
+        classifying_user = User.objects.create_user(username="classifier_user4")
+        visible_storage_path = StoragePathFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=StoragePath.MATCH_LITERAL,
+        )
+        hidden_storage_path = StoragePathFactory(
+            owner=owner,
+            match="invoice",
+            matching_algorithm=StoragePath.MATCH_LITERAL,
+        )
+        assign_perm("view_storagepath", classifying_user, visible_storage_path)
+        doc = DocumentFactory(owner=classifying_user, content="an invoice document")
+
+        matched = match_storage_paths(doc, classifier=None, user=classifying_user)
+        matched_ids = {sp.pk for sp in matched}
+        assert visible_storage_path.pk in matched_ids
+        assert hidden_storage_path.pk not in matched_ids
+
+
+@pytest.mark.django_db
+class TestBulkEditObjectsApplyToAllPermissionBoundary:
+    def test_apply_to_all_tags_excludes_unpermitted_tag(self, rest_api_client):
+        owner = User.objects.create_user(username="tags_owner")
+        requester = User.objects.create_user(username="tags_requester")
+        # grant the global change_tag permission so the object-level
+        # filtering (not the global has_perm check) is what's under test
+        requester.user_permissions.add(
+            Permission.objects.get(codename="change_tag"),
+        )
+        rest_api_client.force_authenticate(user=requester)
+        visible = TagFactory(owner=owner)
+        hidden = TagFactory(owner=owner)
+        assign_perm("view_tag", requester, visible)
+        assign_perm("change_tag", requester, visible)
+
+        response = rest_api_client.post(
+            "/api/bulk_edit_objects/",
+            {
+                "object_type": "tags",
+                "operation": "set_permissions",
+                "all": True,
+                "filters": {},
+                "owner": requester.pk,
+            },
+            format="json",
+        )
+        assert response.status_code == HTTPStatus.OK
+
+        # The apply_to_all dispatch must resolve permitted objects up front:
+        # the visible tag (object-level change_tag granted) gets its owner
+        # reassigned, while the hidden tag (no object-level grant) is
+        # excluded entirely and keeps its original owner.
+        visible.refresh_from_db()
+        hidden.refresh_from_db()
+        assert visible.owner == requester
+        assert hidden.owner == owner
+
+
+@pytest.mark.django_db
+class TestBulkEditObjectsTagDescendantPartialPermission:
+    def test_apply_to_all_descendant_expansion_respects_per_object_permissions(
+        self,
+        rest_api_client,
+    ):
+        """
+        GIVEN:
+            - A tag hierarchy (parent -> permitted_child, unpermitted_child)
+            - A non-superuser requester with object-level change_tag granted
+              on the parent and on only ONE of the two children
+        WHEN:
+            - bulk_edit_objects is called with all=True and a filter that
+              matches only the root (parent) tag, engaging the
+              tag-descendant-expansion logic in BulkEditObjectsView.post
+        THEN:
+            - The descendant expansion only pulls in descendants the
+              requester actually has permission on: the permitted child's
+              owner is reassigned alongside the parent's, while the
+              unpermitted child keeps its original owner. This pins that the
+              expansion checks per-object permissions (editable_ids), not
+              merely "is a descendant of a filter match".
+
+        NOTE: this uses ``set_permissions`` (owner reassignment) rather than
+        ``delete`` as the operation, because Tag.tn_parent (django-treenode)
+        cascades deletes to descendants at the database/ORM level regardless
+        of which tags the view resolved into ``objs`` -- a delete-based test
+        would pass/fail based on FK cascade behavior, not on whether the
+        descendant-expansion logic itself respected per-object permissions.
+        """
+        owner = User.objects.create_user(username="tag_hierarchy_owner")
+        requester = User.objects.create_user(username="tag_hierarchy_requester")
+        # global change_tag permission so the has_perm() gate passes and the
+        # object-level permitted_object_ids filtering is what's under test
+        requester.user_permissions.add(
+            Permission.objects.get(codename="change_tag"),
+        )
+        rest_api_client.force_authenticate(user=requester)
+
+        parent = TagFactory(owner=owner, name="parent-tag")
+        permitted_child = TagFactory(
+            owner=owner,
+            name="permitted-child-tag",
+            tn_parent=parent,
+        )
+        unpermitted_child = TagFactory(
+            owner=owner,
+            name="unpermitted-child-tag",
+            tn_parent=parent,
+        )
+        assign_perm("change_tag", requester, parent)
+        assign_perm("change_tag", requester, permitted_child)
+        # unpermitted_child is intentionally NOT granted change_tag
+
+        response = rest_api_client.post(
+            "/api/bulk_edit_objects/",
+            {
+                "object_type": "tags",
+                "operation": "set_permissions",
+                "all": True,
+                "filters": {"is_root": True},
+                "owner": requester.pk,
+            },
+            format="json",
+        )
+        assert response.status_code == HTTPStatus.OK
+
+        parent.refresh_from_db()
+        permitted_child.refresh_from_db()
+        unpermitted_child.refresh_from_db()
+        assert parent.owner == requester
+        assert permitted_child.owner == requester
+        assert unpermitted_child.owner == owner

src/documents/tests/test_permitted_objects_filter.py

@@ -0,0 +1,70 @@
+import pytest
+from django.contrib.auth.models import User
+from guardian.shortcuts import assign_perm
+from rest_framework.test import APIRequestFactory
+
+from documents.filters import PermittedObjectsFilter
+from documents.models import Tag
+from documents.tests.factories import TagFactory
+
+
+class _DummyView:
+    queryset = Tag.objects.all()
+
+
+@pytest.mark.django_db
+class TestPermittedObjectsFilter:
+    def test_superuser_bypasses_filtering_entirely(self):
+        superuser = User.objects.create_superuser(username="root")
+        owner = User.objects.create_user(username="owner")
+        TagFactory(owner=owner)
+        request = APIRequestFactory().get("/")
+        request.user = superuser
+
+        result = PermittedObjectsFilter().filter_queryset(
+            request,
+            Tag.objects.all(),
+            _DummyView(),
+        )
+        assert result.count() == Tag.objects.count()
+
+    def test_non_superuser_sees_only_owned_unowned_and_granted(self):
+        owner = User.objects.create_user(username="owner")
+        grantee = User.objects.create_user(username="grantee")
+        owned = TagFactory(owner=grantee)
+        unowned = TagFactory(owner=None)
+        granted = TagFactory(owner=owner)
+        hidden = TagFactory(owner=owner)
+        assign_perm("view_tag", grantee, granted)
+        request = APIRequestFactory().get("/")
+        request.user = grantee
+
+        result = PermittedObjectsFilter().filter_queryset(
+            request,
+            Tag.objects.all(),
+            _DummyView(),
+        )
+        visible_ids = set(result.values_list("id", flat=True))
+        assert visible_ids == {owned.pk, unowned.pk, granted.pk}
+        assert hidden.pk not in visible_ids
+
+    def test_include_granted_false_excludes_explicitly_shared_objects(self):
+        owner = User.objects.create_user(username="owner2")
+        grantee = User.objects.create_user(username="grantee2")
+        owned = TagFactory(owner=grantee)
+        granted = TagFactory(owner=owner)
+        assign_perm("view_tag", grantee, granted)
+        request = APIRequestFactory().get("/")
+        request.user = grantee
+
+        class _OwnerOnlyFilter(PermittedObjectsFilter):
+            include_granted = False
+
+        result = _OwnerOnlyFilter().filter_queryset(
+            request,
+            Tag.objects.all(),
+            _DummyView(),
+        )
+        visible_ids = set(result.values_list("id", flat=True))
+        assert visible_ids == {owned.pk}
+        assert granted.pk not in visible_ids

src/documents/views.py

@@ -133,12 +133,10 @@ from documents.file_handling import format_filename
 from documents.filters import CorrespondentFilterSet
 from documents.filters import CustomFieldFilterSet
 from documents.filters import DocumentFilterSet
-from documents.filters import DocumentPermissionsFilter
 from documents.filters import DocumentsOrderingFilter
 from documents.filters import DocumentTypeFilterSet
-from documents.filters import ObjectOwnedOrGrantedPermissionsFilter
-from documents.filters import ObjectOwnedPermissionsFilter
 from documents.filters import PaperlessTaskFilterSet
+from documents.filters import PermittedObjectsFilter
 from documents.filters import ShareLinkBundleFilterSet
 from documents.filters import ShareLinkFilterSet
 from documents.filters import StoragePathFilterSet
@@ -178,6 +176,7 @@ from documents.permissions import has_global_statistics_permission
 from documents.permissions import has_perms_owner_aware
 from documents.permissions import has_system_status_permission
 from documents.permissions import permitted_document_ids
+from documents.permissions import permitted_object_ids
 from documents.permissions import set_permissions_for_object
 from documents.plugins.date_parsing import get_date_parser
 from documents.schema import generate_object_with_permissions_schema
@@ -550,7 +549,7 @@ class CorrespondentViewSet(
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = CorrespondentFilterSet
     ordering_fields = (
@@ -591,7 +590,7 @@ class TagViewSet(PermissionsAwareDocumentCountMixin, ModelViewSet[Tag]):
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = TagFilterSet
     ordering_fields = ("color", "name", "matching_algorithm", "match", "document_count")
@@ -683,7 +682,7 @@ class DocumentTypeViewSet(
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = DocumentTypeFilterSet
     ordering_fields = ("name", "matching_algorithm", "match", "document_count")
@@ -987,7 +986,7 @@ class DocumentViewSet(
         DjangoFilterBackend,
         SearchFilter,
         DocumentsOrderingFilter,
-        DocumentPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = DocumentFilterSet
     search_fields = ("title", "correspondent__name", "effective_content")
@@ -2673,7 +2672,7 @@ class SavedViewViewSet(BulkPermissionMixin, PassUserMixin, ModelViewSet[SavedVie
     permission_classes = (IsAuthenticated, PaperlessObjectPermissions)
     filter_backends = (
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     ordering_fields = ("name",)
 
@@ -3920,7 +3919,7 @@ class StoragePathViewSet(PermissionsAwareDocumentCountMixin, ModelViewSet[Storag
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = StoragePathFilterSet
     ordering_fields = ("name", "path", "matching_algorithm", "match", "document_count")
@@ -4451,7 +4450,7 @@ class ShareLinkViewSet(
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = ShareLinkFilterSet
     ordering_fields = ("created", "expiration", "document")
@@ -4481,7 +4480,7 @@ class ShareLinkBundleViewSet(PassUserMixin, ModelViewSet[ShareLinkBundle]):
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = ShareLinkBundleFilterSet
     ordering_fields = ("created", "expiration", "status")
@@ -4764,10 +4763,8 @@ class BulkEditObjectsView(PassUserMixin):
                 "document_types": DocumentTypeFilterSet,
                 "storage_paths": StoragePathFilterSet,
             }[object_type]
-            user_permitted_objects = get_objects_for_user_owner_aware(
-                user,
-                perm_codename,
-                object_class,
+            user_permitted_objects = object_class.objects.filter(
+                id__in=permitted_object_ids(user, object_class, perm_codename),
             )
             objs = filterset_class(
                 data=filters,
@@ -4792,8 +4789,11 @@ class BulkEditObjectsView(PassUserMixin):
 
         if not user.is_superuser:
             perm = f"documents.{perm_codename}"
-            has_perms = user.has_perm(perm) and all(
-                has_perms_owner_aware(user, perm_codename, obj) for obj in objs
+            has_perms = (
+                user.has_perm(perm)
+                and not objs.exclude(
+                    pk__in=permitted_object_ids(user, object_class, perm_codename),
+                ).exists()
             )
 
             if not has_perms:
@@ -5294,7 +5294,11 @@ class SystemStatusView(PassUserMixin):
 class TrashView(ListModelMixin, PassUserMixin):
     permission_classes = (IsAuthenticated,)
     serializer_class = TrashSerializer
-    filter_backends = (ObjectOwnedPermissionsFilter,)
+
+    class _TrashPermittedObjectsFilter(PermittedObjectsFilter):
+        include_granted = False
+
+    filter_backends = (_TrashPermittedObjectsFilter,)
     pagination_class = StandardPagination
 
     model = Document

src/locale/en_US/LC_MESSAGES/django.po

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: paperless-ngx\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-08-07 20:00+0000\n"
+"POT-Creation-Date: 2026-08-08 14:28+0000\n"
 "PO-Revision-Date: 2022-02-17 04:17\n"
 "Last-Translator: \n"
 "Language-Team: English\n"
@@ -21,39 +21,39 @@ msgstr ""
 msgid "Documents"
 msgstr ""
 
-#: documents/filters.py:472
+#: documents/filters.py:471
 msgid "Value must be valid JSON."
 msgstr ""
 
-#: documents/filters.py:491
+#: documents/filters.py:490
 msgid "Invalid custom field query expression"
 msgstr ""
 
-#: documents/filters.py:501
+#: documents/filters.py:500
 msgid "Invalid expression list. Must be nonempty."
 msgstr ""
 
-#: documents/filters.py:522
+#: documents/filters.py:521
 msgid "Invalid logical operator {op!r}"
 msgstr ""
 
-#: documents/filters.py:536
+#: documents/filters.py:535
 msgid "Maximum number of query conditions exceeded."
 msgstr ""
 
-#: documents/filters.py:600
+#: documents/filters.py:599
 msgid "{name!r} is not a valid custom field."
 msgstr ""
 
-#: documents/filters.py:637
+#: documents/filters.py:636
 msgid "{data_type} does not support query expr {expr!r}."
 msgstr ""
 
-#: documents/filters.py:756 documents/models.py:136
+#: documents/filters.py:755 documents/models.py:136
 msgid "Maximum nesting depth exceeded."
 msgstr ""
 
-#: documents/filters.py:1098
+#: documents/filters.py:1073
 msgid "Custom field not found"
 msgstr ""
 
@@ -1352,7 +1352,7 @@ msgid "workflow runs"
 msgstr ""
 
 #: documents/serialisers.py:521 documents/serialisers.py:873
-#: documents/serialisers.py:2767 documents/views.py:300 documents/views.py:2556
+#: documents/serialisers.py:2767 documents/views.py:299 documents/views.py:2555
 #: paperless_mail/serialisers.py:155
 msgid "Insufficient permissions."
 msgstr ""
@@ -1393,7 +1393,7 @@ msgstr ""
 msgid "Duplicate document identifiers are not allowed."
 msgstr ""
 
-#: documents/serialisers.py:2853 documents/views.py:4510
+#: documents/serialisers.py:2853 documents/views.py:4509
 #, python-format
 msgid "Documents not found: %(ids)s"
 msgstr ""
@@ -1661,36 +1661,36 @@ msgstr ""
 msgid "Unable to parse URI {value}"
 msgstr ""
 
-#: documents/views.py:293 documents/views.py:2553
+#: documents/views.py:292 documents/views.py:2552
 msgid "Invalid more_like_id"
 msgstr ""
 
-#: documents/views.py:1567
+#: documents/views.py:1566
 msgid "Invalid AI configuration."
 msgstr ""
 
-#: documents/views.py:1576
+#: documents/views.py:1575
 msgid "AI backend request timed out."
 msgstr ""
 
-#: documents/views.py:2378 documents/views.py:2699
+#: documents/views.py:2377 documents/views.py:2698
 msgid "Specify only one of text, title_search, query, or more_like_id."
 msgstr ""
 
-#: documents/views.py:4523
+#: documents/views.py:4522
 #, python-format
 msgid "Insufficient permissions to share document %(id)s."
 msgstr ""
 
-#: documents/views.py:4569
+#: documents/views.py:4568
 msgid "Bundle is already being processed."
 msgstr ""
 
-#: documents/views.py:4630
+#: documents/views.py:4629
 msgid "The share link bundle is still being prepared. Please try again later."
 msgstr ""
 
-#: documents/views.py:4640
+#: documents/views.py:4639
 msgid "The share link bundle is unavailable."
 msgstr ""
 

src/paperless/serialisers.py

@@ -217,6 +217,7 @@ class ApplicationConfigurationSerializer(
     llm_api_key = ObfuscatedPasswordField(
         required=False,
         allow_null=True,
+        max_length=1024,
     )
 
     def run_validation(self, data):

src/paperless_mail/views.py

@@ -23,7 +23,7 @@ from rest_framework.response import Response
 from rest_framework.viewsets import ModelViewSet
 from rest_framework.viewsets import ReadOnlyModelViewSet
 
-from documents.filters import ObjectOwnedOrGrantedPermissionsFilter
+from documents.filters import PermittedObjectsFilter
 from documents.models import PaperlessTask
 from documents.permissions import PaperlessObjectPermissions
 from documents.permissions import has_perms_owner_aware
@@ -75,7 +75,7 @@ class MailAccountViewSet(PassUserMixin, ModelViewSet[MailAccount]):
     serializer_class = MailAccountSerializer
     pagination_class = StandardPagination
     permission_classes = (IsAuthenticated, PaperlessObjectPermissions)
-    filter_backends = (ObjectOwnedOrGrantedPermissionsFilter,)
+    filter_backends = (PermittedObjectsFilter,)
 
     def get_permissions(self):
         if self.action == "test":
@@ -197,7 +197,7 @@ class ProcessedMailViewSet(PassUserMixin, ReadOnlyModelViewSet[ProcessedMail]):
     filter_backends = (
         DjangoFilterBackend,
         OrderingFilter,
-        ObjectOwnedOrGrantedPermissionsFilter,
+        PermittedObjectsFilter,
     )
     filterset_class = ProcessedMailFilterSet
 
@@ -225,7 +225,7 @@ class MailRuleViewSet(PassUserMixin, ModelViewSet[MailRule]):
     serializer_class = MailRuleSerializer
     pagination_class = StandardPagination
     permission_classes = (IsAuthenticated, PaperlessObjectPermissions)
-    filter_backends = (ObjectOwnedOrGrantedPermissionsFilter,)
+    filter_backends = (PermittedObjectsFilter,)
 
 
 @extend_schema_view(