Vulnerability advisory

PYSEC-2023-12

Published Feb 1, 2023Updated Jun 10, 2026OSV record ↗

Also known as BIT-django-2023-23969CVE-2023-23969GHSA-q2jf-h9jm-m7p4

Severity

Severity not reported.

Affected versions

django PyPI

Affected	Fixed in
`3.2` to before 3.2.17	`3.2.17`Advisories →
`4.0` to before 4.0.9	`4.0.9`Advisories →
`4.1` to before 4.1.6	`4.1.6`Advisories →
Also listed as affected (32) `3.2` `3.2.1` `3.2.10` `3.2.11` `3.2.12` `3.2.13` `3.2.14` `3.2.15` `3.2.16` `3.2.2` `3.2.3` `3.2.4` `3.2.5` `3.2.6` `3.2.7` `3.2.8` `3.2.9` `4.0` `4.0.1` `4.0.2` `4.0.3` `4.0.4` `4.0.5` `4.0.6` `4.0.7` `4.0.8` `4.1` `4.1.1` `4.1.2` `4.1.3` `4.1.4` `4.1.5`

Description

In Django 3.2 before 3.2.17, 4.0 before 4.0.9, and 4.1 before 4.1.6, the parsed values of Accept-Language headers are cached in order to avoid repetitive parsing. This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large.

References

Webdocs.djangoproject.com/en/4.1/releases/security/ ↗
ARTICLEwww.djangoproject.com/weblog/2023/feb/01/security-releases/ ↗
Webgroups.google.com/forum/#!forum/django-announce ↗
Advisorygithub.com/advisories/GHSA-q2jf-h9jm-m7p4 ↗