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CVE-2026-52844

Caddy: Windows `file_server` path authorization bypass via encoded backslash PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
caddyserver / caddyaffected < 2.11.4

CWE

CWE-22, CWE-284

References

ADP enrichment

CISA-ADP

No English description supplied.