CVE-2026-52844

Description

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.

PUBLISHED Reserved 2026-06-08 | Published 2026-06-23 | Updated 2026-06-23 | Assigner GitHub_M

Problem types

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

CWE-284: Improper Access Control

Product status

References

github.com/.../caddy/security/advisories/GHSA-qrp7-cvwr-j2c6 exploit

github.com/.../caddy/security/advisories/GHSA-qrp7-cvwr-j2c6

cve.org (CVE-2026-52844)

nvd.nist.gov (CVE-2026-52844)

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