Vulnerability advisory

PYSEC-2026-55

Published May 5, 2026Updated Jun 10, 2026OSV record ↗

Also known as BIT-django-2026-6907CVE-2026-6907GHSA-5hrc-gvxj-w55p

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected versions

django PyPI

Affected	Fixed in
`5.2` to before 5.2.14	`5.2.14`Advisories →
`6.0` to before 6.0.5	`6.0.5`Advisories →
Also listed as affected (19) `5.2` `5.2.1` `5.2.10` `5.2.11` `5.2.12` `5.2.13` `5.2.2` `5.2.3` `5.2.4` `5.2.5` `5.2.6` `5.2.7` `5.2.8` `5.2.9` `6.0` `6.0.1` `6.0.2` `6.0.3` `6.0.4`

Description

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.

PYSEC-2026-55

Affected versions

django PyPI

Description

References