Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | django | >= 5.2a1, < 5.2.8, >= 5.0a1, < 5.1.14, < 4.2.26 | 5.2.8, 5.1.14, 4.2.26 |
References
- https://docs.djangoproject.com/en/dev/releases/security/
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases/
- https://groups.google.com/g/django-announce
- https://github.com/advisories/GHSA-qw25-v68c-qjf3
- https://nvd.nist.gov/vuln/detail/CVE-2025-64458
- 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://docs.djangoproject.com/en/dev/releases/security
- https://github.com/django/django
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-107.yaml
- https://www.djangoproject.com/weblog/2025/nov/05/security-releases
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-407- Platform
- Python (PyPI)
- Package
django- Disclosed
- 05.11.2025
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2025-107 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-qw25-v68c-qjf3 - CC BY 4.0
Vulnerability history: django
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 162
- First → latest
- 10.2007 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 16
- High 65
- Medium 63
- Low 18
Disclosures per year
- 2017: 3
- 2018: 5
- 2019: 11
- 2020: 6
- 2021: 8
- 2022: 14
- 2023: 7
- 2024: 14
- 2025: 12
- 2026: 26
earlier: 56
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Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows this entry
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