🛡️ CVE-2025-14550 — django

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-407 OSV

8.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

Potential denial-of-service vulnerability via repeated headers when using ASGI

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2025-14550 is classified as CWE-407: Inefficient Algorithmic Complexity. Crafted input drives an algorithm into its worst case, so a small request costs disproportionate work.

Affected software

CVE-2025-14550 is recorded against 1 package.

django

Timeline and source

Published on 5 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

docs.djangoproject.com (Web)
groups.google.com (Web)
nvd.nist.gov (Web)
www.djangoproject.com (Web)

CVE-2025-14550 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity HIGH

CVSS Score 8.0

CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

CWE CWE-407

Public Exploit ✅ No

Source OSV

Published 2026-02-05

Updated 2026-08-12

Modified 2026-06-17

Fix URL https://docs.djangoproject.com/en/dev/releases/security/

Affected Packages

Software	From version	Fixed in
django	—	—

References

WEB https://docs.djangoproject.com/en/dev/releases/security/

WEB https://groups.google.com/g/django-announce

WEB https://nvd.nist.gov/vuln/detail/CVE-2025-14550

WEB https://www.djangoproject.com/weblog/2026/feb/03/security-releases/

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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