CVE-2025-27556
Description
An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.
CWE
- CWE-770 — CWE-770 Allocation of Resources Without Limits or Throttling
Affected
- djangoproject / Django — v=5.0 <5.0.14 [affected]; v=5.1 <5.1.8 [affected]
CVSS
- 3.1 score=5.8 severity=MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
References
- https://docs.djangoproject.com/en/dev/releases/security/
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
Source
cvelistV5-main/cves/2025/27xxx/CVE-2025-27556.json