Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 do not sufficiently verify the identity of a Kerberos authentication service in certain password-based authentication configurations. A network-positioned attacker could impersonate trusted authentication infrastructure, potentially resulting in unauthorized access or modification of protected data.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97567
https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-October-2026