Vulnerability Details CVE-2026-27585
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations. Version 2.11.1 fixes the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.6%
CVSS Severity
CVSS v3 Score 6.5
References
- https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L361
- https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L398
- https://github.com/caddyserver/caddy/releases/tag/v2.11.1
- https://github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4
Products affected by CVE-2026-27585
-
cpe:2.3:a:caddyserver:caddy:0.10.0
-
cpe:2.3:a:caddyserver:caddy:0.10.1
-
cpe:2.3:a:caddyserver:caddy:0.10.10
-
cpe:2.3:a:caddyserver:caddy:0.10.11
-
cpe:2.3:a:caddyserver:caddy:0.10.12
-
cpe:2.3:a:caddyserver:caddy:0.10.13
-
cpe:2.3:a:caddyserver:caddy:0.10.14
-
cpe:2.3:a:caddyserver:caddy:0.10.2
-
cpe:2.3:a:caddyserver:caddy:0.10.3
-
cpe:2.3:a:caddyserver:caddy:0.10.4
-
cpe:2.3:a:caddyserver:caddy:0.10.5
-
cpe:2.3:a:caddyserver:caddy:0.10.6
-
cpe:2.3:a:caddyserver:caddy:0.10.7
-
cpe:2.3:a:caddyserver:caddy:0.10.8
-
cpe:2.3:a:caddyserver:caddy:0.10.9
-
cpe:2.3:a:caddyserver:caddy:0.11.0
-
cpe:2.3:a:caddyserver:caddy:0.11.1
-
cpe:2.3:a:caddyserver:caddy:0.5.0
-
cpe:2.3:a:caddyserver:caddy:0.5.1
-
cpe:2.3:a:caddyserver:caddy:0.6.0
-
cpe:2.3:a:caddyserver:caddy:0.7.0
-
cpe:2.3:a:caddyserver:caddy:0.7.1
-
cpe:2.3:a:caddyserver:caddy:0.7.2
-
cpe:2.3:a:caddyserver:caddy:0.7.3
-
cpe:2.3:a:caddyserver:caddy:0.7.4
-
cpe:2.3:a:caddyserver:caddy:0.7.5
-
cpe:2.3:a:caddyserver:caddy:0.7.6
-
cpe:2.3:a:caddyserver:caddy:0.8.0
-
cpe:2.3:a:caddyserver:caddy:0.8.1
-
cpe:2.3:a:caddyserver:caddy:0.8.2
-
cpe:2.3:a:caddyserver:caddy:0.8.3
-
cpe:2.3:a:caddyserver:caddy:0.9.0
-
cpe:2.3:a:caddyserver:caddy:0.9.1
-
cpe:2.3:a:caddyserver:caddy:0.9.2
-
cpe:2.3:a:caddyserver:caddy:0.9.3
-
cpe:2.3:a:caddyserver:caddy:0.9.4
-
cpe:2.3:a:caddyserver:caddy:0.9.5
-
cpe:2.3:a:caddyserver:caddy:1.0.0
-
cpe:2.3:a:caddyserver:caddy:1.0.1
-
cpe:2.3:a:caddyserver:caddy:1.0.2
-
cpe:2.3:a:caddyserver:caddy:1.0.3
-
cpe:2.3:a:caddyserver:caddy:1.0.4
-
cpe:2.3:a:caddyserver:caddy:1.0.5
-
cpe:2.3:a:caddyserver:caddy:2.0.0
-
cpe:2.3:a:caddyserver:caddy:2.1.0
-
cpe:2.3:a:caddyserver:caddy:2.1.1
-
cpe:2.3:a:caddyserver:caddy:2.10.0
-
cpe:2.3:a:caddyserver:caddy:2.10.1
-
cpe:2.3:a:caddyserver:caddy:2.10.2
-
cpe:2.3:a:caddyserver:caddy:2.11.0
-
cpe:2.3:a:caddyserver:caddy:2.2.0
-
cpe:2.3:a:caddyserver:caddy:2.2.1
-
cpe:2.3:a:caddyserver:caddy:2.2.3
-
cpe:2.3:a:caddyserver:caddy:2.3.0
-
cpe:2.3:a:caddyserver:caddy:2.4.0
-
cpe:2.3:a:caddyserver:caddy:2.4.1
-
cpe:2.3:a:caddyserver:caddy:2.4.2
-
cpe:2.3:a:caddyserver:caddy:2.4.3
-
cpe:2.3:a:caddyserver:caddy:2.4.4
-
cpe:2.3:a:caddyserver:caddy:2.4.5
-
cpe:2.3:a:caddyserver:caddy:2.4.6
-
cpe:2.3:a:caddyserver:caddy:2.5.0
-
cpe:2.3:a:caddyserver:caddy:2.5.1
-
cpe:2.3:a:caddyserver:caddy:2.5.2
-
cpe:2.3:a:caddyserver:caddy:2.6.0
-
cpe:2.3:a:caddyserver:caddy:2.6.1
-
cpe:2.3:a:caddyserver:caddy:2.6.2
-
cpe:2.3:a:caddyserver:caddy:2.6.3
-
cpe:2.3:a:caddyserver:caddy:2.6.4
-
cpe:2.3:a:caddyserver:caddy:2.7.0
-
cpe:2.3:a:caddyserver:caddy:2.7.1
-
cpe:2.3:a:caddyserver:caddy:2.7.2
-
cpe:2.3:a:caddyserver:caddy:2.7.3
-
cpe:2.3:a:caddyserver:caddy:2.7.4
-
cpe:2.3:a:caddyserver:caddy:2.7.5
-
cpe:2.3:a:caddyserver:caddy:2.7.6
-
cpe:2.3:a:caddyserver:caddy:2.8.0
-
cpe:2.3:a:caddyserver:caddy:2.8.1
-
cpe:2.3:a:caddyserver:caddy:2.8.2
-
cpe:2.3:a:caddyserver:caddy:2.8.3
-
cpe:2.3:a:caddyserver:caddy:2.8.4
-
cpe:2.3:a:caddyserver:caddy:2.9.0
-
cpe:2.3:a:caddyserver:caddy:2.9.1