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Vulnerability advisory

CVE-2026-6907

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

Published Updated OSV record ↗

Also known as BIT-django-2026-6907GHSA-5hrc-gvxj-w55pPYSEC-2026-55

Severity
  • CVSS 4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Affected versions

Repository

Affected commitsFixed by commit
GIT github.com/django/django ↗
9e7cc2b628fe8fd3895986af9b7fc9525034c1b0 to before 024c26b1e77ea5b1b158265167ade47927a64c06024c26b1e77ea5b1b158265167ade47927a64c06
36b5f39d9372147f0e758f590e35ee2b2bc317dd to before 8f8ad09659d728423a00e0a3b5f16da5c3a38e248f8ad09659d728423a00e0a3b5f16da5c3a38e24
Also listed as affected (19)
  • 5.2.13
  • 6.0.4
  • 5.2.12
  • 6.0.3
  • 5.2.11
  • 6.0.2
  • 6.0.1
  • 5.2.10
  • 6.0
  • 5.2.9
  • 5.2.8
  • 5.2.7
  • 5.2.6
  • 5.2.5
  • 5.2.4
  • 5.2.3
  • 5.2.2
  • 5.2.1
  • 5.2

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.

References

  • Codex
  • Claude Code
  • VS Code
  • GitHub Copilot
  • Cursor
  • Cline
  • Windsurf
  • Google Anti-gravity
  • OpenCode
  • Pi
  • Gemini CLI
  • Hermes Agent
  • Zed
  • Junie
  • Qwen Code
  • Kiro
  • Kilo Code
  • Factory Droid

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