CVE-2026-30852

HIGH

7.5

Descripcion

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the vars_regexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When vars_regexp matches against a placeholder like {http.request.header.X-Input}, the header value gets resolved once (expected), then passed through repl.ReplaceAll() again (the bug). This means an attacker can put {env.DATABASE_URL} or {file./etc/passwd} in a request header and the server will evaluate it, leaking environment variables, file contents, and system info. This issue has been patched in version 2.11.2.

Detalles CVE

Puntuacion CVSS v3.17.5

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado3/7/2026

Ultima modificacion3/11/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

caddyserver:caddy

Debilidades (CWE)

CWE-74CWE-200

Referencias

https://github.com/caddyserver/caddy/pull/5408(security-advisories@github.com)

https://github.com/caddyserver/caddy/releases/tag/v2.11.2(security-advisories@github.com)

https://github.com/caddyserver/caddy/security/advisories/GHSA-m2w3-8f23-hxxf(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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