CVE-2025-64458
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.
| Software | From | Fixed in |
|---|---|---|
Django
|
5.2a1 | 5.2.8 |
|
Django
|
5.0a1 | 5.1.14 |
|
Django
|
- | 4.2.26 |
| djangoproject / django | 4.2 | 4.2.26 |
| djangoproject / django | 5.1 | 5.1.14 |
| djangoproject / django | 5.2 | 5.2.8 |
- https://docs.djangoproject.com/en/dev/releases/security
- https://docs.djangoproject.com/en/dev/releases/security/
- https://github.com/django/django/commit/3790593781d26168e7306b5b2f8ea0309de16242
- https://github.com/django/django/commit/4f5d904b63751dea9ffc3b0e046404a7fa5881ac
- https://github.com/django/django/commit/6e13348436fccf8f22982921d6a3a3e65c956a9f
- https://github.com/django/django/commit/770eea38d7a0e9ba9455140b5a9a9e33618226a7
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases/
Deep Security Visibility Without the Complexity
SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.
- No setup fees
- 5-min deployment
- Cancel anytime