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CVE-2026-6907

Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware

Published: May 5, 2026Updated: May 7, 2026 Sources: CVE List NVDCWE-524
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.3%
Top 81.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-524

Affected Products

djangodjangoprojectOSS Libraries
DjangodjangoprojectOSS Libraries
djangoprojectoss-projectOSS Librariesaka django

Exploitability

Official Patch Available

References

https://docs.djangoproject.com/en/dev/releases/security/
docs.djangoproject.com
https://groups.google.com/g/django-announce
groups.google.com
https://www.djangoproject.com/weblog/2026/may/05/security-releases/
djangoproject.com

Timeline

Published
May 5, 2026
Last Updated
May 7, 2026

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