diff --git a/dojo/finding/ui/views.py b/dojo/finding/ui/views.py
index 9b0241421ff..24cfe1641ea 100644
--- a/dojo/finding/ui/views.py
+++ b/dojo/finding/ui/views.py
@@ -63,6 +63,7 @@
     MergeFindings,
     ReviewFindingForm,
 )
+from dojo.finding_group.queries import get_authorized_finding_groups
 from dojo.forms import (
     GITHUBFindingForm,
     JIRAFindingForm,
@@ -81,7 +82,6 @@
     Engagement,
     FileAccessToken,
     Finding,
-    Finding_Group,
     Finding_Template,
     GITHUB_Issue,
     GITHUB_PKey,
@@ -2707,7 +2707,12 @@ def _bulk_update_finding_groups(finds, form):
     if form.cleaned_data["finding_group_add"]:
         logger.debug("finding_group_add checked!")
         fgid = form.cleaned_data["add_to_finding_group_id"]
-        finding_group = Finding_Group.objects.get(id=fgid)
+        # Scope the target group to the ones the user may edit, the same way the
+        # submitted findings are scoped above. Without this a caller could pass a
+        # group id from a product they have no access to.
+        finding_group = get_object_or_404(
+            get_authorized_finding_groups("edit"), id=fgid,
+        )
         finding_group, added, skipped = finding_helper.add_to_finding_group(
             finding_group, finds,
         )
diff --git a/unittests/test_bulk_finding_authorization.py b/unittests/test_bulk_finding_authorization.py
index de076f6f487..2dcd3e70a57 100644
--- a/unittests/test_bulk_finding_authorization.py
+++ b/unittests/test_bulk_finding_authorization.py
@@ -4,12 +4,13 @@
 A product-scoped, non-staff user must not be able to bulk-delete (or edit)
 findings belonging to products they are not authorized for via
 ``finding_bulk_update_all`` (``/finding/bulk``), even by POSTing arbitrary
-finding ids.
+finding ids. The same scoping applies to the target finding group when adding
+findings to a group.
 """
 
 from django.urls import reverse
 
-from dojo.models import Dojo_User, Finding, Test
+from dojo.models import Dojo_User, Finding, Finding_Group, Test
 
 from .dojo_test_case import DojoTestCase, versioned_fixtures
 
@@ -56,3 +57,30 @@ def test_scoped_user_cannot_bulk_edit_other_products_findings(self):
             self.other_finding.severity, original_severity,
             msg="scoped user edited a finding outside their authorized products",
         )
+
+    def test_scoped_user_cannot_add_finding_to_other_products_group(self):
+        # A finding the user is allowed to edit, in their authorized product,
+        # not yet part of any group.
+        my_finding = Finding.objects.filter(
+            test__engagement__product=self.product,
+            finding_group__isnull=True,
+        ).first()
+        self.assertIsNotNone(my_finding)
+        # A group that belongs to a different product.
+        other_test = Test.objects.exclude(
+            engagement__product=self.product,
+        ).first()
+        other_group = Finding_Group.objects.create(
+            name="scoping_regression_group", test=other_test, creator=self.user,
+        )
+        response = self.client.post(reverse("finding_bulk_update_all"), {
+            "finding_to_update": [my_finding.id],
+            "finding_group_add": "true",
+            "add_to_finding_group_id": other_group.id,
+        })
+        self.assertLess(response.status_code, 500)
+        self.assertNotIn(
+            my_finding.id,
+            list(other_group.findings.values_list("id", flat=True)),
+            msg="scoped user added a finding to a group outside their authorized products",
+        )