high7.5
CVE-2025-64458
Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | django | >= 5.2a1, < 5.2.8 | 5.2.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Djangoproject | Django | from 4.2 before 4.2.26 from 5.1 before 5.1.14 from 5.2 before 5.2.8 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://docs.djangoproject.com/en/dev/releases/security/
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases/
- https://github.com/advisories/GHSA-qw25-v68c-qjf3
- https://nvd.nist.gov/vuln/detail/CVE-2025-64458
- https://docs.djangoproject.com/en/dev/releases/security
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases
- 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://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-107.yaml