CVE-2025-27556 – Django Denial-of-Service Vulnerability

The following table lists the changes that have been made to the
CVE-2025-27556 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 02, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
    Added CWE CWE-770
    Added Reference https://docs.djangoproject.com/en/dev/releases/security/
    Added Reference https://groups.google.com/g/django-announce
    Added Reference https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
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