GHSA-wqfg-m96j-85vm
Django Potential Denial of Service (DoS) on Windows
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
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
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-27556
- https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
- https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
- https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
- https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
- https://docs.djangoproject.com/en/dev/releases/security
- https://github.com/django/django
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2025/apr/02/security-releases
- http://www.openwall.com/lists/oss-security/2025/04/02/2