CVE-2026-73269: Red Hat Multicluster Engine For Kubernetes 2.10

Critical severity, CVSS 9.9. EPSS: 0.6% chance of exploitation in the next 30 days.

A flaw was found in the cluster-curator-controller component. A local user, by creating a ClusterCurator resource with a specific naming convention, can trigger the creation of a cluster-scoped ClusterRoleBinding. This allows the user to escalate their privileges from namespace-local access to cluster-wide control. This privilege escalation grants broad permissions, including the ability to access and manipulate secrets, manage cluster actions, and delete hosted clusters or node pools.

Affected products

• Red Hat Multicluster Engine For Kubernetes 2.10: before 1787201612 (fixed in 1787201612)
• Red Hat Multicluster Engine For Kubernetes 2.11: before 1787238383 (fixed in 1787238383)
• Red Hat Multicluster Engine For Kubernetes 2.17: before 1786750700 (fixed in 1786750700)
• Red Hat Multicluster Engine For Kubernetes 2.6: before 1787264185 (fixed in 1787264185)
• Red Hat Multicluster Engine For Kubernetes 2.8: before 1787259011 (fixed in 1787259011)
• Red Hat Multicluster Engine For Kubernetes 2.9: before 1787201646 (fixed in 1787201646)

Published 2026-08-12. Last modified 2026-09-29.