VULNERABILITY INTELLIGENCE

CVE-2026-4740

CVSS score8.2 HIGH
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-04-07
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-295
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-295

Primary references