An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. `django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`'*'`). This can lead to private data being stored and served. 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 Ahmad Sadeddin for reporting this issue.
History

Sat, 09 May 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 07 May 2026 14:30:00 +0000

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

Wed, 06 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 05 May 2026 18:15:00 +0000

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

Tue, 05 May 2026 16:15:00 +0000

Type Values Removed Values Added
Description An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. `django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`'*'`). This can lead to private data being stored and served. 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 Ahmad Sadeddin for reporting this issue.
Title Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware
Weaknesses CWE-524
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: DSF

Published:

Updated: 2026-05-06T15:25:33.698Z

Reserved: 2026-04-23T11:19:30.877Z

Link: CVE-2026-6907

cve-icon Vulnrichment

Updated: 2026-05-05T17:03:49.787Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-05T16:16:18.227

Modified: 2026-05-07T14:16:04.940

Link: CVE-2026-6907

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-05T14:50:02Z

Links: CVE-2026-6907 - Bugzilla