GHSA-33mw-q7rj-mjwj
Django has Inefficient Algorithmic Complexity
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.
`ASGIRequest` allows a remote attacker to cause a potential denial-of-service via a crafted request with multiple duplicate headers.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Jiyong Yang for reporting this issue.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-14550
- https://github.com/django/django/commit/eb22e1d6d643360e952609ef562c139a100ea4eb
- https://docs.djangoproject.com/en/dev/releases/security
- https://github.com/django/django
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-43.yaml
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2026/feb/03/security-releases