View at Official alpine advisory, NVD, CVE.org · CVE detail
Freshness: no update timestamp found; verify against the upstream OS advisory manually.
CVE-2026-30852: 1 source package rows (caddy); 23 state rows across 2 repos (3.23-community, edge-community); fixed 2, open 21.
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.