{"id":"GO-2026-4539","summary":"Caddy mTLS authentication fails open in github.com/caddyserver/caddy/v2","details":"Caddy mTLS authentication fails open in github.com/caddyserver/caddy/v2","aliases":["CVE-2026-27586","GHSA-hffm-g8v7-wrv7"],"modified":"2026-03-17T05:08:38.598215Z","published":"2026-02-26T16:27:51Z","database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4539"},"references":[{"type":"ADVISORY","url":"https://github.com/caddyserver/caddy/security/advisories/GHSA-hffm-g8v7-wrv7"},{"type":"FIX","url":"https://github.com/caddyserver/caddy/commit/d42d39b4bc237c628f9a95363b28044cb7a7fe72"},{"type":"WEB","url":"https://gist.github.com/moscowchill/9566c79c76c0b64c57f8bd0716f97c48"},{"type":"WEB","url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.1"}],"affected":[{"package":{"name":"github.com/caddyserver/caddy/v2","ecosystem":"Go","purl":"pkg:golang/github.com/caddyserver/caddy/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.1"}]}],"ecosystem_specific":{"imports":[{"symbols":["ClientAuthentication.ConfigureTLSConfig","ConnectionPolicies.Provision"],"path":"github.com/caddyserver/caddy/v2/modules/caddytls"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4539.json"}}],"schema_version":"1.7.5"}