{"id":"BIT-mongodb-2026-18703","summary":"Improper Enforcement of Authentication Mechanism Restrictions in MongoDB Server Allows Use of Disabled Authentication Method","details":"An issue in MongoDB Server could allow a party with a valid client certificate and a corresponding user account to authenticate using a certificate-based authentication method, even when an administrator has configured the server to restrict authentication to other mechanisms. This could allow authentication through a method the administrator intended to disable.","aliases":["CVE-2026-18703"],"modified":"2026-09-17T14:45:07.853361318Z","published":"2026-09-17T11:50:07.497Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*","cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:-:*:*"]},"references":[{"type":"ADVISORY","url":"https://jira.mongodb.org/browse/SERVER-127863"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18703"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Bitnami","purl":"pkg:bitnami/mongodb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.2.0"},{"fixed":"8.3.8"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mongodb/BIT-mongodb-2026-18703.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}],"schema_version":"1.9.0"}