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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
djangoproject:django
References 7
https://docs.djangoproject.com/en/dev/releases/security/
Django security archive
https://groups.google.com/g/django-announce
Django releases announcements
https://github.com/django/django/commit/c88b304cc2d90fc37d3bd1f5f3829706fa6c13bc
NVD
https://github.com/django/django/commit/7e878b0f8bd42260903e6a0d38996a93b0474a0b
NVD
https://github.com/django/django/commit/3d32ee80ae52745d686bf94d3555000ddf073267
NVD
https://github.com/django/django/commit/02a69e3791e3df23d45ea4ea7e7fc489f0eef2be
NVD
https://www.djangoproject.com/weblog/2026/oct/06/security-releases/
Django security releases issued: 6.1.2, 6.0.9, and 5.2.18