GHSA-wqfg-m96j-85vm
Django Potential Denial of Service (DoS) on Windows
At a glance
- Published
- Updated
- CVE
- CVE-2025-27556
- Aliases
- BIT-django-2025-27556, PYSEC-2025-14
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · django | introduced 5.0, fixed 5.0.14 |
| PyPI · django | introduced 5.1, fixed 5.1.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-27556 ADVISORY
- https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd WEB
- https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821 WEB
- https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1 WEB
- https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8 WEB
- https://docs.djangoproject.com/en/dev/releases/security WEB
- https://github.com/django/django PACKAGE
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml WEB
- https://groups.google.com/g/django-announce WEB
- https://www.djangoproject.com/weblog/2025/apr/02/security-releases WEB
- http://www.openwall.com/lists/oss-security/2025/04/02/2 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |