CVE-2026-73268
CriticalCVSS 9.9Summary
A flaw in the cluster-curator-controller component of multicluster engine (MCE) allows a tenant with create or update permissions on ClusterCurator resources to inject an arbitrary Job specification. The CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension.
Risk Assessment
The injected Job can run with the controller's elevated privileges, leading to arbitrary code execution, privilege escalation, and potential access to cluster-wide secrets.
Recommendation
Restrict permissions on ClusterCurator resources and update the component to a patched version that validates user input.
Original NVD description (English source)
A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.