CVE-2026-30852

HIGH

7.5

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung7.5

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht3/7/2026

Zuletzt geandert3/11/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

caddyserver:caddy

Schwachen (CWE)

CWE-74CWE-200

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

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