Bug 2356899 (CVE-2025-27556)

Summary: CVE-2025-27556 django: Django DoS Unicode Attack
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: brking, caswilli, dnakabaa, dranck, haoli, hkataria, jajackso, jcammara, jmitchel, jneedle, jtanner, jwong, kaycoth, kegrant, kholdawa, koliveir, kshier, lcouzens, mabashia, mskarbek, pbraun, shvarugh, simaishi, smcdonal, stcannon, teagle, tfister, thavo, ttakamiy, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Django. This vulnerability allows denial of service attacks via certain inputs with an excessive number of Unicode characters.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2025-04-02 13:01:07 UTC 
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.