CVE-2026-30852

HIGH

7.5

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.17.5

SeveridadeHIGH

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado3/7/2026

Ultima modificacao3/11/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

caddyserver:caddy

Fraquezas (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)

Correlacoes IOC

Sem correlacoes registradas

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