Progress MarkLogic Server 12.x releases before 12.1.0 contain an out-of-bounds read vulnerability in certain query-processing functionality. A remote authenticated attacker could exploit this vulnerability to cause server instability or disclose limited information from process memory.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97563
https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-October-2026