CVE-2026-15337

Name	CVE-2026-15337
Description	An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. `django.utils.translation.check_for_language()` is subject to a potential denial-of-service attack when given many distinct, very long language codes, which are retained as keys in an in-memory cache and consume process memory. Such codes reach the function through the `django.views.i18n.set_language()` view, which is not routed by default. The consumed memory is bounded, since request data is limited by the `DATA_UPLOAD_MAX_MEMORY_SIZE` setting (default 2.5 MB) and the cache holds a fixed maximum number of entries. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Jaeyoung Jang for reporting this issue.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1143611

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-django (PTS)	bullseye	2:2.2.28-1~deb11u2	vulnerable
	bullseye (security)	2:2.2.28-1~deb11u12	vulnerable
	bookworm	3:3.2.25-0+deb12u3	vulnerable
	bookworm (security)	3:3.2.25-0+deb12u2	vulnerable
	trixie	3:4.2.28-0+deb13u2	vulnerable
	trixie (security)	3:4.2.28-0+deb13u1	vulnerable
	forky	3:5.2.16-1	vulnerable
	sid	3:5.2.17-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-django	source	(unstable)	3:5.2.17-1			1143611

Notes

https://www.djangoproject.com/weblog/2026/aug/04/security-releases/
Fixed by: https://github.com/django/django/commit/c72a5dbb64d0777f3f471f1be94e8b2ca91e0959 (5.2.17)