CVE-2026-66792criticalCWE-863

CVE-2026-66792: critical vulnerability in Red Hat Multicluster Global Hub 1.4.9

Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters

Published · Updated

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.9epss 0.7%
A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Red Hat · Multicluster Global Hub 1.4.9Red Hat · Multicluster Global Hub 1.5.8Red Hat · Multicluster Global Hub 1.6.6Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.11Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.14Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.15Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.16Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.17Red Hat · Red Hat OpenShift Container Platform 4Red Hat · Red Hat Openshift Data Foundation 4
Related CVEs — Red Hat Multicluster Global Hub 1.4.9

In the same product, most dangerous first.

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