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8.2высокая

CVE-2026-4740

Описание

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.

Затрагиваемое ПО
Redhat Advanced cluster management for kubernetes
CVSS
Балл8.2 — высокая
ВекторCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Источники
https://access.redhat.com/security/cve/CVE-2026-4740https://blog.arfevrier.fr/open-cluster-management-cross-cluster-escape/https://bugzilla.redhat.com/show_bug.cgi?id=2450590https://access.redhat.com/security/cve/CVE-2026-4740https://bugzilla.redhat.com/show_bug.cgi?id=2450590https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4740.json