Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware
CVE-2026-8404
2.3LOW
What is CVE-2026-8404?
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 Version(s)
Django 6.0 < 6.0.6
Django 5.2 < 5.2.15
Django 6.0.6