Vulnerability in djangoproject Django

[ Description ]Official description

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. `django.utils.http.parse_header_parameters()` was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An unauthenticated request could reach this parsing through headers such as `Accept` or `Content-Type`, for instance via the content negotiation performed by `HttpRequest.accepts()`. The per-call length limit does not bound the combined size of repeated headers. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Jisung Chae for reporting this issue.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3780

  Django: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-77050CVE-2026-84429CVE-2026-87975+1 more CVEs

[ References ]References

• docs.djangoproject.com/en/dev/releases/security
• github.com/django/django/commit/3d8f121695c21234aff3071de0d38b6bd38c3f52
• github.com/django/django/commit/6ecd66e09a383be004a78a3a738ea9727ff07b0e
• github.com/django/django/commit/7ff7fcc0508864a4bc39693128ace38b1e95a890
• github.com/django/django/commit/de56deeabd4c48dfb5193f0001469d80102fb367
• groups.google.com/g/django-announce
• www.djangoproject.com/weblog/2026/oct/06/security-releases