{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"critical"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2026-27586","title":"Title"},{"category":"description","text":"Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in `ClientAuthentication.provision()` cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts without error but accepts any client certificate signed by any system-trusted CA, completely bypassing the intended private CA trust boundary. Any deployment using `trusted_ca_cert_file` or `trusted_ca_certs_pem_files` for mTLS will silently degrade to accepting any system-trusted client certificate if the CA file becomes unavailable. This can happen due to a typo in the path, file rotation, corruption, or permission changes. The server gives no indication that mTLS is misconfigured. Version 2.11.1 fixes the vulnerability.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2026-27586","url":"https://www.suse.com/security/cve/CVE-2026-27586"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1258841 for CVE-2026-27586","url":"https://bugzilla.suse.com/1258841"},{"category":"external","summary":"Advisory link for SUSE-SU-2026:0757-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2026-March/024527.html"}],"title":"SUSE CVE CVE-2026-27586","tracking":{"current_release_date":"2026-03-04T00:25:44Z","generator":{"date":"2026-02-26T00:24:58Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2026-27586","initial_release_date":"2026-02-26T00:24:58Z","revision_history":[{"date":"2026-02-26T00:24:58Z","number":"2","summary":"references added,severity changed from  to critical"},{"date":"2026-03-04T00:25:44Z","number":"3","summary":"references added"}],"status":"interim","version":"3"}}}