Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Djangoproject | Django | >= 5.2, < 5.2.15 |
Related Weaknesses (CWE)
References
- https://docs.djangoproject.com/en/dev/releases/security/PatchVendor Advisory
- https://groups.google.com/g/django-announceRelease Notes
- https://www.djangoproject.com/weblog/2026/jun/03/security-releases/PatchVendor Advisory
FAQ
What is CVE-2026-8404?
CVE-2026-8404 is a vulnerability with a CVSS score of 3.1 (LOW). 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-insensitivel...
How severe is CVE-2026-8404?
CVE-2026-8404 has been rated LOW with a CVSS base score of 3.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8404?
Check the references section above for vendor advisories and patch information. Affected products include: Djangoproject Django.