GHSA-qw25-v68c-qjf3
HIGH
Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
Published November 5, 2025Updated February 4, 2026Source: osv
Details
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.
Remediation
Upgrade to the fixed version using your package manager.
pip
Update django to 5.1.14 or laterpip install "django>=5.1.14"
pip
Update django to 5.2.8 or laterpip install "django>=5.2.8"
pip
Update django to 4.2.26 or laterpip install "django>=4.2.26"
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (3)
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-407
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 3.1 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-64458ADVISORY
- https://github.com/django/django/commit/3790593781d26168e7306b5b2f8ea0309de16242WEB
- https://github.com/django/django/commit/4f5d904b63751dea9ffc3b0e046404a7fa5881acWEB
- https://github.com/django/django/commit/6e13348436fccf8f22982921d6a3a3e65c956a9fWEB
- https://github.com/django/django/commit/770eea38d7a0e9ba9455140b5a9a9e33618226a7WEB
- https://docs.djangoproject.com/en/dev/releases/securityWEB
- https://github.com/django/djangoPACKAGE
- https://groups.google.com/g/django-announceWEB
- https://www.djangoproject.com/weblog/2025/nov/05/security-releasesWEB
Risk Assessment
CVSS Score
3.1
Exploitation is difficult or impact is minor. Address in your next planned update.
EPSS Score (30-day exploit probability)
0.03%
Higher than 7% of vulnerabilities
Also Known As
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