CVE-2026-6907: Djangoproject Django

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. `django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`'*'`). This can lead to private data being stored and served. 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 Ahmad Sadeddin for reporting this issue.

Affected products

• Djangoproject Django: from 5.2, before 5.2.14 (fixed in 5.2.14); from 6.0, before 6.0.5 (fixed in 6.0.5)

Published 2026-05-05. Last modified 2026-06-17.