CVE-2026-52845
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-287
Autenticación incorrecta
Fecha de publicación:
23/06/2026
Última modificación:
15/07/2026
Descripción
*** Pendiente de traducción *** Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, forward_auth copy_headers deletes the exact client-supplied identity header before copying the trusted value from the auth gateway. But when the request later goes through php_fastcgi, Caddy normalizes HTTP headers into CGI variables by replacing - with _. This lets a client send an underscore alias that survives the forward_auth delete step but becomes the same PHP/FastCGI variable. Result: a remote client can inject or sometimes override identity/group headers trusted by PHP/FastCGI applications behind Caddy. This vulnerability is fixed in 2.11.4.
Impacto
Puntuación base 3.x
8.10
Gravedad 3.x
ALTA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:* | 2.11.4 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página
Referencias a soluciones, herramientas e información
- https://github.com/caddyserver/caddy/security/advisories/GHSA-f59h-q822-g45g
- https://access.redhat.com/security/cve/CVE-2026-52845
- https://bugzilla.redhat.com/show_bug.cgi?id=2491907
- https://github.com/caddyserver/caddy/security/advisories/GHSA-f59h-q822-g45g
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52845.json



