Bug 2512934

Summary:	CVE-2026-15337 python-django5: Django: Denial-of-service vulnerability due to excessive memory consumption [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	python-django5	Assignee:	Michel Lind <michel>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	michel, python-packagers-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["e1b3cf5f-72c3-47fc-85a8-842c5fb15ed1"]}
Fixed In Version:	python-django5-5.2.17-2.fc45 python-django5-5.2.17-2.fc43 python-django5-5.2.17-2.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-18 00:15:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2511110

Description Ganesh 2026-08-09 17:11:13 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Aoife Moloney 2026-08-17 15:49:54 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Fedora Update System 2026-09-09 17:25:21 UTC

FEDORA-2026-6b28b4e483 (python-django5-5.2.17-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b28b4e483

Comment 3 Fedora Update System 2026-09-09 17:25:21 UTC

FEDORA-2026-950089270f (python-django5-5.2.17-2.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-950089270f

Comment 4 Fedora Update System 2026-09-10 01:47:25 UTC

FEDORA-2026-301e6e2983 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-301e6e2983`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-301e6e2983

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-09-10 02:07:36 UTC

FEDORA-2026-6b28b4e483 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6b28b4e483`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b28b4e483

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-09-10 02:18:09 UTC

FEDORA-2026-950089270f has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-950089270f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-950089270f

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-09-18 00:15:57 UTC

FEDORA-2026-950089270f (python-django5-5.2.17-2.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-09-18 01:01:58 UTC

FEDORA-2026-6b28b4e483 (python-django5-5.2.17-2.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-09-18 01:16:07 UTC

FEDORA-2026-301e6e2983 (python-django5-5.2.17-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.