CVE-2025-27556

medium

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.

References

https://www.djangoproject.com/weblog/2025/apr/02/security-releases/

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

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

http://www.openwall.com/lists/oss-security/2025/04/02/2

Details

Source: Mitre, NVD

Published: 2025-04-02

Updated: 2025-04-02

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Severity: Medium