Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows

7.5 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

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.

Basic Information

ID CVE-2025-64458

Source DSF

Published Nov 5, 2025 at 15:07

Modified Nov 5, 2025 at 16:20

Affected Product

Vendor djangoproject

Product Django

Version 5.2

Affected Versions djangoproject Django 5.2
djangoproject Django 5.1
djangoproject Django 4.2

CWE Classification

CWE-407

References

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    "published": "2025-11-05T15:07:17.031Z",
    "modified": "2025-11-05T16:20:57.265Z",
    "type": "cve",
    "title": "Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows",
    "source": "DSF",
    "references": "https://docs.djangoproject.com/en/dev/releases/security/\nhttps://groups.google.com/g/django-announce\nhttps://www.djangoproject.com/weblog/2025/nov/05/security-releases/",
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Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows_CVE-2025-64458