CVE-2026-8404
LowCVSS 3.1Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In Django 5.2 before 5.2.15 and 6.0 before 6.0.6, `django.middleware.cache.UpdateCacheMiddleware` does not match `Cache-Control` response directives case-insensitively. A remote attacker can read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values.
Risk Assessment
The risk is potential leakage of sensitive data that should be excluded from caching but was incorrectly cached due to improper header parsing.
Recommendation
Upgrade Django to version 5.2.15, 6.0.6, or later. Also review caching configuration to ensure sensitive data is not stored in cache.
Original NVD description (English source)
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.