# Django 6.0.7 documentation

# Django 4.2.28 release notes

February 3, 2026

Django 4.2.28 fixes three security issues with severity "high", two security issues with severity "moderate", and one security issue with severity "low" in 4.2.27.

## CVE-2025-13473: Username enumeration through timing difference in mod_wsgi authentication handler

The `django.contrib.auth.handlers.modwsgi.check_password()` function for authentication via mod_wsgi allowed remote attackers to enumerate users via a timing attack.

This issue has severity "low" according to the Django security policy.

## CVE-2025-14550: Potential denial-of-service vulnerability via repeated headers when using ASGI

When receiving duplicates of a single header, `ASGIRequest` allowed a remote attacker to cause a potential denial-of-service via a specifically created request with multiple duplicate headers. The vulnerability resulted from repeated string concatenation while combining repeated headers, which produced super-linear computation resulting in service degradation or outage.

This issue has severity "moderate" according to the Django security policy.

## CVE-2026-1207: Potential SQL injection via raster lookups on PostGIS

Raster lookups on GIS fields (only implemented on PostGIS) were subject to SQL injection if untrusted data was used as a band index.

提醒一下，所有不受信任的用户输入在使用前都应进行验证。

This issue has severity "high" according to the Django security policy.

## CVE-2026-1285: Potential denial-of-service vulnerability in `django.utils.text.Truncator` HTML methods

`django.utils.text.Truncator.chars()` and `Truncator.words()` methods (with `html=True`) and the `truncatechars_html` and `truncatewords_html` template filters were subject to a potential denial-of-service attack via certain inputs with a large number of unmatched HTML end tags, which could cause quadratic time complexity during HTML parsing.

This issue has severity "moderate" according to the Django security policy.

## CVE-2026-1287: Potential SQL injection in column aliases via control characters

`FilteredRelation` was subject to SQL injection in column aliases via control characters, using a suitably crafted dictionary, with dictionary expansion, as the `**kwargs` passed to `QuerySet.annotate()`, `aggregate()`, `extra()`, `values()`, `values_list()`, and `alias()`.

This issue has severity "high" according to the Django security policy.

## CVE-2026-1312: Potential SQL injection via `QuerySet.order_by` and `FilteredRelation`

`QuerySet.order_by()` was subject to SQL injection in column aliases containing periods when the same alias was, using a suitably crafted dictionary, with dictionary expansion, used in `FilteredRelation`.

This issue has severity "high" according to the Django security policy.