CVE-2026-4740

HIGH

8.2

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung8.2

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

AngriffsvektorLOCAL

KomplexitatLOW

Erforderliche PrivilegienHIGH

BenutzerinteraktionNONE

Veroffentlicht4/7/2026

Zuletzt geandert4/7/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-295

Referenzen

https://access.redhat.com/security/cve/CVE-2026-4740(secalert@redhat.com)

https://blog.arfevrier.fr/open-cluster-management-cross-cluster-escape/(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2450590(secalert@redhat.com)

IOC Korrelationen

Keine Korrelationen erfasst

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