Headline
GHSA-qw25-v68c-qjf3: Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8.
NFKC normalization in Python is slow on Windows. As a consequence, django.http.HttpResponseRedirect, django.http.HttpResponsePermanentRedirect, and the shortcut django.shortcuts.redirect were subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Seokchan Yoon for reporting this issue.
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- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-64458
Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
High severity GitHub Reviewed Published Nov 5, 2025 to the GitHub Advisory Database • Updated Nov 5, 2025
Affected versions
>= 5.2a1, < 5.2.8
>= 5.0a1, < 5.1.14
< 4.2.26
Patched versions
5.2.8
5.1.14
4.2.26
Description
Published to the GitHub Advisory Database
Nov 5, 2025
EPSS score
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