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.
Problem types
CWE-407: Inefficient Algorithmic Complexity
Product status
6.0 (semver) before 6.0.2
6.0.2 (semver)
5.2 (semver) before 5.2.11
5.2.11 (semver)
4.2 (semver) before 4.2.28
4.2.28 (semver)
3 (semver) before 3.11.1
3.11.1 (semver)
Timeline
| 2025-11-14: | Initial report received. |
| 2025-12-16: | Vulnerability confirmed. |
| 2026-02-03: | Security release issued. |
Credits
Jiyong Yang
Jake Howard
Jacob Walls
References
docs.djangoproject.com/en/dev/releases/security/ (Django security archive)
groups.google.com/g/django-announce (Django releases announcements)
www.djangoproject.com/weblog/2026/feb/03/security-releases/ (Django security releases issued: 6.0.2, 5.2.11, and 4.2.28)