CVE-2025-64458
HIGH EPSS 77.1%
Published Nov 5, 20257mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
Published Nov 5, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
77.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-407
Affected Products 3
| Vendor | Product | Version | Range |
|---|---|---|---|
| djangoproject | django | * | ≥4.2 – <4.2.26 |
| djangoproject | django | * | ≥5.1 – <5.1.14 |
| djangoproject | django | * | ≥5.2 – <5.2.8 |
References 3
- docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
- groups.google.com https://groups.google.com/g/django-announce
- djangoproject.com https://www.djangoproject.com/weblog/2025/nov/05/security-releases/
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.