PYSEC-2026-201

At a glance

Published
Updated
CVE
CVE-2026-8404
Aliases
BIT-django-2026-8404, GHSA-8cjm-8mp7-r2xf
CVSS_V3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Description

An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values. 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 Ahmed Badawe for reporting this issue.

Affected packages

PackageVersions
PyPI · djangointroduced 5.2, fixed 5.2.15, introduced 6.0, fixed 6.0.6

References

Sources

SourceLicence
OSV.devCC-BY 4.0 — PyPA Advisory Database