CVE-2026-52844

Summary

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside /private/, but file_server later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can bypass Caddy path-scoped auth/deny routes protecting /private/. This vulnerability is fixed in 2.11.4.

Affected Software

Weaknesses

• CWE-22: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
• CWE-284: CWE-284: Improper Access Control

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6

References

• https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6

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