Description
An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18.
`django.utils.translation.get_supported_language_variant()` is subject to
a potential denial-of-service attack when processing many distinct, very long
language codes, which are retained as keys in an in-memory cache and
consume process memory.
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 Gleb Lizunov for reporting this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| djangoproject | Django | 6.1 – < 6.1.2, 6.0 – < 6.0.9, 5.2 – < 5.2.18 | 6.1.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-django | 3:5.2.18-1 | — |
| Debian 13 | python-django | No fix yet | — |
| Debian 12 | python-django | 3:3.2.25-0+deb12u6 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | python-django | No fix yet | — |
| Ubuntu 26.04 LTS | python-django | No fix yet | — |
| Ubuntu 24.04 LTS | python-django | No fix yet | — |
| Ubuntu 22.04 LTS | python-django | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | python-django | No fix yet | — |
| Ubuntu Pro 18.04 LTS | python-django | No fix yet | — |
| Ubuntu Pro 16.04 LTS | python-django | No fix yet | — |
| Ubuntu Pro 14.04 LTS | python-django | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | python-Django | 4.2.11-150600.3.68.1 | SUSE-SU-2026:4626-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-Django | 6.1.2-1.1 | openSUSE-SU-2026:12103-1 |
| openSUSE Tumbleweed | python-Django4 | 4.2.30-6.1 | openSUSE-SU-2026:12086-1 |
| openSUSE Tumbleweed | python-Django5 | 5.2.18-1.1 | openSUSE-SU-2026:12095-1 |
| openSUSE Leap 16.0 | python-Django | 5.2.4-bp160.12.1 | openSUSE-SU-2026:22196-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | py3-django | 5.2.18-r0 | — |
Advisories 6
- WID-SEC-2026-3780 Django: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 1, 2026
- openSUSE-SU-2026:22196-1 Security update for python-Django SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:4626-1 Security update for python-Django SUSE / openSUSE Security Updates · Oct 13, 2026
- openSUSE-SU-2026:12103-1 python313-Django-6.1.2-1.1 on GA media SUSE / openSUSE Security Updates · Oct 11, 2026
- openSUSE-SU-2026:12095-1 python313-Django5-5.2.18-1.1 on GA media SUSE / openSUSE Security Updates · Oct 10, 2026
- openSUSE-SU-2026:12086-1 python313-Django4-4.2.30-6.1 on GA media SUSE / openSUSE Security Updates · Oct 9, 2026
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- https://github.com/django/django/commit/c88b304cc2d90fc37d3bd1f5f3829706fa6c13bc patch
- https://github.com/django/django/commit/7e878b0f8bd42260903e6a0d38996a93b0474a0b patch
- https://github.com/django/django/commit/3d32ee80ae52745d686bf94d3555000ddf073267 patch
- https://github.com/django/django/commit/02a69e3791e3df23d45ea4ea7e7fc489f0eef2be patch
- Django security releases issued: 6.1.2, 6.0.9, and 5.2.18 vendor-advisory