CVE-2026-27590
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-20
Validación incorrecta de entrada
Fecha de publicación:
24/02/2026
Última modificación:
25/02/2026
Descripción
*** Pendiente de traducción *** Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because `strings.ToLower()` can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect `SCRIPT_NAME`/`SCRIPT_FILENAME` and `PATH_INFO`, potentially causing a request that contains `.php` to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.
Impacto
Puntuación base 4.0
8.90
Gravedad 4.0
ALTA
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:* | 2.11.1 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página



