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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.
Reserved 2025-03-02 | Published 2025-04-02 | Updated 2025-04-02 | Assigner mitreCWE-770 Allocation of Resources Without Limits or Throttling
docs.djangoproject.com/en/dev/releases/security/
groups.google.com/g/django-announce
www.djangoproject.com/weblog/2025/apr/02/security-releases/
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