CVE-2026-77050Potential denial-of-service vulnerability in get_supported_language_variant()

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• 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