{"id":"DEBIAN-CVE-2026-27589","details":"Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.","modified":"2026-09-29T13:03:47.890994353Z","published":"2026-02-24T17:29:04.317Z","upstream":["CVE-2026-27589"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-27589"}],"affected":[{"package":{"name":"caddy","ecosystem":"Debian:12","purl":"pkg:deb/debian/caddy?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.2-1","2.11.2-1~bpo13+1","2.11.4-1","2.6.2-10","2.6.2-11","2.6.2-12","2.6.2-13","2.6.2-14","2.6.2-5","2.6.2-6","2.6.2-6.1","2.6.2-7","2.6.2-8","2.6.2-9"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27589.json"}},{"package":{"name":"caddy","ecosystem":"Debian:13","purl":"pkg:deb/debian/caddy?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.2-12+deb13u1"}]}],"versions":["2.6.2-12"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27589.json"}},{"package":{"name":"caddy","ecosystem":"Debian:14","purl":"pkg:deb/debian/caddy?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.2-1"}]}],"versions":["2.11.2-1~bpo13+1","2.6.2-12","2.6.2-13","2.6.2-14"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27589.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}