CVE-2026-52844 — Caddy: Windows `file_server` path authorization bypass via encoded backslash
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_serve…
Published: 2026-06-23 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7