[5.2.x] Fixed CVE-2025-13372 -- Protected FilteredRelation against SQL injection in column aliases on PostgreSQL.

Follow-up to CVE-2025-57833.

Thanks Stackered for the report, and Simon Charette and Mariusz Felisiak
for the reviews.

Backport of 5b90ca1e7591fa36fccf2d6dad67cf1477e6293e from main.

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/annotations/tests.py b/tests/annotations/tests.py
index 7a12121224..78e5408d0f 100644
--- a/tests/annotations/tests.py
+++ b/tests/annotations/tests.py
@@ -1507,3 +1507,14 @@ class AliasTests(TestCase):
         )
         with self.assertRaisesMessage(ValueError, msg):
             Book.objects.alias(**{crafted_alias: FilteredRelation("authors")})
+
+    def test_alias_filtered_relation_sql_injection_dollar_sign(self):
+        qs = Book.objects.alias(
+            **{"crafted_alia$": FilteredRelation("authors")}
+        ).values("name", "crafted_alia$")
+        if connection.vendor == "postgresql":
+            msg = "Dollar signs are not permitted in column aliases on PostgreSQL."
+            with self.assertRaisesMessage(ValueError, msg):
+                list(qs)
+        else:
+            self.assertEqual(qs.first()["name"], self.b1.name)