CVE-2025-14550

CVE-2025-14550: Potential denial-of-service vulnerability via repeated headers when using ASGI

Vendor Djangoproject
Product Django
Weakness CWE-407
Published February 3, 2026
Last update February 3, 2026

CVSS base score

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 3, 2026 CVE published
February 3, 2026 Record updated