Vulnerability Details CVE-2025-27556
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.3%
CVSS Severity
CVSS v3 Score 5.8
References
Products affected by CVE-2025-27556
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cpe:2.3:a:djangoproject:django:5.0
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cpe:2.3:a:djangoproject:django:5.0.1
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cpe:2.3:a:djangoproject:django:5.0.10
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cpe:2.3:a:djangoproject:django:5.0.11
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cpe:2.3:a:djangoproject:django:5.0.12
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cpe:2.3:a:djangoproject:django:5.0.13
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cpe:2.3:a:djangoproject:django:5.0.2
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cpe:2.3:a:djangoproject:django:5.0.3
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cpe:2.3:a:djangoproject:django:5.0.4
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cpe:2.3:a:djangoproject:django:5.0.5
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cpe:2.3:a:djangoproject:django:5.0.6
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cpe:2.3:a:djangoproject:django:5.0.7
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cpe:2.3:a:djangoproject:django:5.0.8
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cpe:2.3:a:djangoproject:django:5.0.9
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cpe:2.3:a:djangoproject:django:5.1
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cpe:2.3:a:djangoproject:django:5.1.1
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cpe:2.3:a:djangoproject:django:5.1.2
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cpe:2.3:a:djangoproject:django:5.1.3
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cpe:2.3:a:djangoproject:django:5.1.4
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cpe:2.3:a:djangoproject:django:5.1.5
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cpe:2.3:a:djangoproject:django:5.1.6
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cpe:2.3:a:djangoproject:django:5.1.7
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cpe:2.3:o:microsoft:windows:-