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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-qw25-v68c-qjf3 Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 05 Nov 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 05 Nov 2025 15:15:00 +0000

Type Values Removed Values Added
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.
Title Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
Weaknesses CWE-407
References

cve-icon MITRE

Status: PUBLISHED

Assigner: DSF

Published:

Updated: 2025-11-05T16:20:57.265Z

Reserved: 2025-11-04T14:35:57.526Z

Link: CVE-2025-64458

cve-icon Vulnrichment

Updated: 2025-11-05T16:20:35.464Z

cve-icon NVD

Status : Received

Published: 2025-11-05T15:15:40.940

Modified: 2025-11-05T17:15:45.880

Link: CVE-2025-64458

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.