Django has Inefficient Algorithmic Complexity
GHSA-33mw-q7rj-mjwj · BIT-django-2025-14550 · CVE-2025-14550 · PYSEC-2026-43
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Description
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
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-14550
- WEB https://github.com/django/django/commit/eb22e1d6d643360e952609ef562c139a100ea4eb
- WEB https://docs.djangoproject.com/en/dev/releases/security
- PACKAGE https://github.com/django/django
- WEB https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-43.yaml
- WEB https://groups.google.com/g/django-announce
- WEB https://www.djangoproject.com/weblog/2026/feb/03/security-releases
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