cvedb.io
CVE-2026-4740
HIGH · CVSS 8.2
EPSS exploitation probability: 0%
Published 2026-04-07T15:17:46.797 · Last modified 2026-06-30T03:20:41.413

Summary

A flaw was found in Open Cluster Management (OCM), the technology underlying Red Hat Advanced Cluster Management (ACM). Improper validation of Kubernetes client certificate renewal allows a managed cluster administrator to forge a client certificate that can be approved by the OCM controller. This enables cross-cluster privilege escalation and may allow an attacker to gain control over other managed clusters, including the hub cluster.

Affected products

redhat — advanced_cluster_management_for_kubernetes

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.