Security Advisory

CVE-2026-4740

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-04-07 14:30:36

Last updated 2026-07-15 00:48:58

Assigner redhat

CVSS score not scored

State PUBLISHED

Description

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.

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