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Upstream Repository: https://github.com/django/django.git
Bug Details: https://nvd.nist.gov/vuln/detail/CVE-2025-27556
Type: Security Advisory
CVE: CVE-2025-27556
Score: 7.5
Analysis:
- CVE-2025-27556 affects Django 5.1 before 5.1.8 and 5.0 before 5.0.14.
- The issue occurs due to slow NFKC normalization on Windows, which can cause
a denial-of-service (DoS) when handling inputs containing a very large number
of Unicode characters.
- Affected Django components:
django.contrib.auth.views.LoginView
django.contrib.auth.views.LogoutView
django.views.i18n.set_language
- This performance degradation is specific to Windows, caused by the Windows
Unicode normalization implementation.
Reference:
- https://nvd.nist.gov/vuln/detail/CVE-2025-27556
- https://github.com/django/django/commit/2cb311f7b069
Signed-off-by: Anil Dongare <adongare@cisco.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>
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