CVE-2025-64458 Details
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.
A denial-of-service vulnerability has been identified in Django's response redirection classes on Windows. This issue arises from the NFKC normalization process in Python, which is slow when handling certain inputs with a high volume of Unicode characters. As a result, the classes 'HttpResponseRedirect', 'HttpResponsePermanentRedirect', and the shortcut 'redirect' can be exploited to cause a denial-of-service condition. This vulnerability affects Django versions 5.1 prior to 5.1.14, 4.2 prior to 4.2.26, and 5.2 prior to 5.2.8. Additionally, earlier unsupported Django series such as 5.0.x, 4.1.x, and 3.2.x may also be affected.
Users can upgrade to Django versions 5.2.8, 5.1.14, or 4.2.26 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Nov 5, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://docs.djangoproject.com/en/dev/releases/security/ | Django Software Foundation | Vendor Advisory |
| https://groups.google.com/g/django-announce | Django Software Foundation | Mailing List |
| https://www.djangoproject.com/weblog/2025/nov/05/security-releases/ | Django Software Foundation | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-407 | Inefficient Algorithmic Complexity | Django Software Foundation |
Affected Products
| Product | Versions |
|---|---|
| djangoproject django | >= 4.2, < 4.2.26 >= 5.1, < 5.1.14 >= 5.2, < 5.2.8 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | Django Software Foundation |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Nov 10, 2025 | Initial Analysis | [email protected] |
| Nov 5, 2025 | CVE Modified | CISA-ADP |
| Nov 5, 2025 | New CVE Received | Django Software Foundation |