CVE-2026-8404 LOW

CVE-2026-8404: Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware

Vendor Djangoproject
Product Django
Weakness CWE-178
Published June 3, 2026
Last update June 3, 2026

CVSS base score

3.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 3, 2026 CVE published
June 3, 2026 Record updated