Threats Tagged 'cve-2026-84429'

A denial-of-service vulnerability exists in Django versions prior to 6.1.2, 6.0.9, and 5.2.18. The issue arises from the django.utils.http.parse_header_parameters() function, which can exhibit quadratic time complexity when parsing headers with many separators inside quoted parameters. This can be triggered by unauthenticated requests via headers like Accept or Content-Type, potentially causing service disruption.

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.