# Django 5.2.9 - dokumentacja

# Django 4.2.27 release notes

December 2, 2025

Django 4.2.27 fixes one security issue with severity „high”, one security issue with severity „moderate”, and one bug in 4.2.26.

## CVE-2025-13372: Potential SQL injection in `FilteredRelation` column aliases on PostgreSQL

`FilteredRelation` was subject to SQL injection in column aliases, using a suitably crafted dictionary, with dictionary expansion, as the `**kwargs` passed to `QuerySet.annotate()` or `QuerySet.alias()` on PostgreSQL.

## CVE-2025-64460: Potential denial-of-service vulnerability in XML `Deserializer`

XML Serialization was subject to a potential denial-of-service attack due to quadratic time complexity when deserializing crafted documents containing many nested invalid elements. The internal helper `django.core.serializers.xml_serializer.getInnerText()` previously accumulated inner text inefficiently during recursion. It now collects text per element, avoiding excessive resource usage.

## Poprawki błędów

- Fixed a regression in Django 4.2.26 where `DisallowedRedirect` was raised by `HttpResponseRedirect` and `HttpResponsePermanentRedirect` for URLs longer than 2048 characters. The limit is now 16384 characters (#36743).