CVE-2025-14550

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.

CVSS Metrics

• v4.0•MEDIUM•Score: 6.9CVSS: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
• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 1.03%• Percentile: 62%

Techniques & Countermeasures

• CWE-407•Inefficient Algorithmic Complexity

  An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

Affected Systems

• chainguard•authentik

  < 2025.12.1-r2

• chainguard•authentik-fips

  < 2025.12.1-r2

• chainguard•awx

  < 24.6.1-r27

• chainguard•label-studio

  < 1.22.0-r3

• debian•python-django

  < 3:3.2.25-0+deb12u2 | < 3:4.2.28-0+deb13u1 | < 3:4.2.28-1

• djangoproject•asgiref

  ≥ 3, < 3.11.1

• djangoproject•django

  ≥ 4.2, < 4.2.28 | ≥ 5.2, < 5.2.11 | ≥ 6.0, < 6.0.2

• PyPI•django

  ≥ 6.0, < 6.0.2 | ≥ 6.0a1, < 6.0.2 | ≥ 5.2a1, < 5.2.11 | ≥ 4.2a1, < 4.2.28

References (16)

• https://docs.djangoproject.com/en/dev/releases/security/
• https://groups.google.com/g/django-announce
• https://www.djangoproject.com/weblog/2026/feb/03/security-releases/
• 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://www.djangoproject.com/weblog/2026/feb/03/security-releases
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-43.yaml
• https://github.com/advisories/GHSA-33mw-q7rj-mjwj
• https://security-tracker.debian.org/tracker/CVE-2025-14550
• https://github.com/django/asgiref/
• https://github.com/django/django/
• https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/14xxx/CVE-2025-14550.json
• https://pypi.org/project/Django/
• https://pypi.org/project/asgiref/