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.

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History

Fri, 05 Jun 2026 12:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

Thu, 04 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1289
References
Metrics threat_severity

None

threat_severity

Low


Wed, 03 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Djangoproject
Djangoproject django
Vendors & Products Djangoproject
Djangoproject django

Wed, 03 Jun 2026 14:15:00 +0000

Type Values Removed Values Added
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.
Title Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware
Weaknesses CWE-178
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: DSF

Published:

Updated: 2026-06-03T15:46:40.439Z

Reserved: 2026-05-12T15:06:18.803Z

Link: CVE-2026-8404

cve-icon Vulnrichment

Updated: 2026-06-03T15:46:37.589Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-03T14:16:47.650

Modified: 2026-06-05T12:38:18.840

Link: CVE-2026-8404

cve-icon Redhat

Severity : Low

Publid Date: 2026-06-03T13:16:29Z

Links: CVE-2026-8404 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-04T01:45:46Z

Weaknesses