CVE-2025-27556GHSA-WQFG-M96J-85VMBIT-DJANGO-2025-27556PYSEC-2025-14
An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.0.14, 5.1.8
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- djangoproject Django
From 5.0 · fixed in 5.0.14; From 5.1 · fixed in 5.1.8
- djangoPyPI
From 5.0 · fixed in 5.0.14
- djangoPyPI
From 5.1 · fixed in 5.1.8
- djangoPyPI
From 5.1 · fixed in 5.1.8; From 5.0 · fixed in 5.0.14