CVE-2026-6907

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-524
Vendor	djangoproject
Product	django
Published	May 5, 2026

Stay Ahead of the Next One

Get instant alerts for djangoproject django

Be the first to know when new medium vulnerabilities affecting djangoproject django are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

djangoproject / Django

6.0 < 6.0.5 5.2 < 5.2.14

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Ahmad Sadeddin Sarah Boyce Sarah Boyce