CVE-2026-55559 Yamcs: Remote Code Execution via instance-template argument YAML injection (createInstance)

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs inserts templateArgs from POST /api/instances and PATCH /api/instances/instance into YAML through VarStatement.append in yamcs-core/src/main/java/org/yamcs/templating/VarStatement.java without YAML-context escaping. The...

EUVD-2026-67843

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs inserts templateArgs from POST /api/instances and PATCH /api/instances/instance into YAML through VarStatement.append in yamcs-core/src/main/java/org/yamcs/templating/VarStatement.java without YAML-context escaping. The...

CVE-2026-55559

CVE-2026-55559 is a Critical (CVSS 9.8) remote code execution vulnerability in Yamcs (mission control framework) prior to versions 5.12.8 and 5.13.2 . The root cause is that templateArgs submitted via POST /api/instances or PATCH /api/instances/{instance} are appended into the rendered YAML confi...