Description
An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://docs.djangoproject.com/en/4.2/releases/security/Patch
- https://groups.google.com/forum/#%21forum/django-announcePermissions Required
- https://security.netapp.com/advisory/ntap-20231214-0001/
- https://www.djangoproject.com/weblog/2023/nov/01/security-releases/Patch, Vendor Advisory
- https://docs.djangoproject.com/en/4.2/releases/security/Patch
- https://groups.google.com/forum/#%21forum/django-announcePermissions Required
- https://security.netapp.com/advisory/ntap-20231214-0001/
- https://www.djangoproject.com/weblog/2023/nov/01/security-releases/Patch, Vendor Advisory
Timeline
- Published
- Nov 2, 2023
- Last modified
- Jun 17, 2026
- NVD status
- Modified