diff --git a/dojo/api_v2/views.py b/dojo/api_v2/views.py
index bd61d76ee2a..27444b33fc7 100644
--- a/dojo/api_v2/views.py
+++ b/dojo/api_v2/views.py
@@ -1546,6 +1546,7 @@ def get_duplicate_cluster(self, request, pk):
     )
     @action(detail=True, methods=["post"], url_path=r"duplicate/reset", permission_classes=(IsAuthenticated, permissions.UserHasFindingRelatedObjectPermission))
     def reset_finding_duplicate_status(self, request, pk):
+        self.get_object()
         checked_duplicate_id = reset_finding_duplicate_status_internal(
             request.user, pk,
         )
@@ -1566,6 +1567,7 @@ def reset_finding_duplicate_status(self, request, pk):
         detail=True, methods=["post"], url_path=r"original/(?P<new_fid>\d+)", permission_classes=(IsAuthenticated, permissions.UserHasFindingRelatedObjectPermission),
     )
     def set_finding_as_original(self, request, pk, new_fid):
+        self.get_object()
         success = set_finding_as_original_internal(request.user, pk, new_fid)
         if not success:
             return Response(status=status.HTTP_400_BAD_REQUEST)
diff --git a/unittests/test_permissions_audit.py b/unittests/test_permissions_audit.py
index 9d4ca0a746e..7e4ead33580 100644
--- a/unittests/test_permissions_audit.py
+++ b/unittests/test_permissions_audit.py
@@ -1571,18 +1571,16 @@ def test_finding_metadata_reader_allowed(self):
         self.assertEqual(response.status_code, 200, response.content)
 
     # ── Finding: duplicate status actions ──────────────────────────────
-    # NOTE: reset_finding_duplicate_status and set_finding_as_original
-    # bypass self.get_object(), so DRF object-level permission checks
-    # (has_object_permission) never fire. The internal helpers do their
-    # own permission checks. These tests verify current behaviour.
+    # reset_finding_duplicate_status and set_finding_as_original call
+    # self.get_object() so DRF's object-level permission check runs via
+    # UserHasFindingRelatedObjectPermission (POST -> Finding_Edit).
 
     def test_finding_reset_duplicate_reader(self):
-        """View bypasses get_object() — internal helper checks permissions."""
+        """Reader lacks Finding_Edit — POST must be denied before the helper runs."""
         client = self._client_for_user(self.reader_user)
         url = reverse("finding-reset-finding-duplicate-status", args=(self.finding.id,))
         response = client.post(url, format="json")
-        # Returns 400 (not a duplicate) — internal helper runs before perm check
-        self.assertEqual(response.status_code, 400, response.content)
+        self.assertEqual(response.status_code, 403, response.content)
 
     def test_finding_reset_duplicate_writer(self):
         client = self._client_for_user(self.writer_user)
diff --git a/unittests/test_rest_framework.py b/unittests/test_rest_framework.py
index 43483a13e3d..0c15703e646 100644
--- a/unittests/test_rest_framework.py
+++ b/unittests/test_rest_framework.py
@@ -1849,6 +1849,70 @@ def test_post_without_finding_returns_4xx(self):
         self.assertLess(response.status_code, 500)
 
 
+@versioned_fixtures
+class FindingActionAuthzTest(DojoAPITestCase):
+
+    fixtures = ["dojo_testdata.json"]
+
+    def _client_for(self, username):
+        user = User.objects.get(username=username)
+        token = Token.objects.get(user=user)
+        client = APIClient()
+        client.credentials(HTTP_AUTHORIZATION="Token " + token.key)
+        return client
+
+    def test_admin_can_reset_finding_duplicate_status(self):
+        client = self._client_for("admin")
+        # Mark finding 2 as a duplicate of finding 3 first, then reset.
+        set_response = client.post("/api/v2/findings/2/original/3/")
+        self.assertEqual(set_response.status_code, status.HTTP_204_NO_CONTENT, set_response.content[:500])
+        reset_response = client.post("/api/v2/findings/2/duplicate/reset/")
+        self.assertEqual(reset_response.status_code, status.HTTP_204_NO_CONTENT, reset_response.content[:500])
+        refreshed = Finding.objects.get(pk=2)
+        self.assertFalse(refreshed.duplicate)
+        self.assertIsNone(refreshed.duplicate_finding)
+
+    def test_admin_can_set_finding_as_original(self):
+        client = self._client_for("admin")
+        response = client.post("/api/v2/findings/2/original/3/")
+        self.assertEqual(response.status_code, status.HTTP_204_NO_CONTENT, response.content[:500])
+        refreshed = Finding.objects.get(pk=2)
+        self.assertTrue(refreshed.duplicate)
+        self.assertEqual(refreshed.duplicate_finding_id, 3)
+
+    def test_unrelated_user_cannot_reset_finding_duplicate_status(self):
+        client = self._client_for("user2")
+        # Sanity: finding 7 is not visible to this user.
+        self.assertEqual(client.get("/api/v2/findings/7/").status_code, 404)
+
+        before = Finding.objects.get(pk=7)
+        before_duplicate = before.duplicate
+        before_duplicate_finding_id = before.duplicate_finding_id
+
+        response = client.post("/api/v2/findings/7/duplicate/reset/")
+        self.assertIn(response.status_code, (403, 404), response.content[:500])
+
+        after = Finding.objects.get(pk=7)
+        self.assertEqual(after.duplicate, before_duplicate)
+        self.assertEqual(after.duplicate_finding_id, before_duplicate_finding_id)
+
+    def test_unrelated_user_cannot_set_finding_as_original(self):
+        client = self._client_for("user2")
+        # Sanity: finding 7 is not visible to this user.
+        self.assertEqual(client.get("/api/v2/findings/7/").status_code, 404)
+
+        before = Finding.objects.get(pk=7)
+        before_duplicate = before.duplicate
+        before_duplicate_finding_id = before.duplicate_finding_id
+
+        response = client.post("/api/v2/findings/7/original/2/")
+        self.assertIn(response.status_code, (403, 404), response.content[:500])
+
+        after = Finding.objects.get(pk=7)
+        self.assertEqual(after.duplicate, before_duplicate)
+        self.assertEqual(after.duplicate_finding_id, before_duplicate_finding_id)
+
+
 @versioned_fixtures
 class FilesTest(DojoAPITestCase):
     fixtures = ["dojo_testdata.json"]