MEDIUM5.3

PYSEC-2026-55

Quick fix

PYSEC-2026-55 — django: upgrade to the fixed version with the command below.

pip install --upgrade 'django>=5.2.14'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/django

Introduced in: 5.2Fixed in: 5.2.14

Fixpip install --upgrade 'django>=5.2.14'

References

https://docs.djangoproject.com/en/dev/releases/security/[ADVISORY]
https://groups.google.com/g/django-announce[ADVISORY]
https://www.djangoproject.com/weblog/2026/may/05/security-releases/[ADVISORY]
https://github.com/advisories/GHSA-5hrc-gvxj-w55p[ADVISORY]