by Kastro CVE-2026-66792
Red Hat Multicluster Global Hub 1.4.9 — Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
Multicluster Global Hub 1.4.9see advisory1788355439CNA
Multicluster Global Hub 1.4.9see advisory1788355599CNA
Multicluster Global Hub 1.4.9see advisory1788355417CNA
Multicluster Global Hub 1.5.8see advisory1789515408CNA
Multicluster Global Hub 1.5.8see advisory1789515288CNA
Multicluster Global Hub 1.5.8see advisory1789478830CNA
Multicluster Global Hub 1.6.6see advisory1790085494CNA
Multicluster Global Hub 1.6.6see advisory1790086176CNA
Multicluster Global Hub 1.6.6see advisory1790085268CNA
Red Hat Advanced Cluster Management for Kubernetes 2.11see advisory1787262214CNA
Red Hat Advanced Cluster Management for Kubernetes 2.11see advisory1787263584CNA
Red Hat Advanced Cluster Management for Kubernetes 2.13see advisory1787259284CNA
Scores by source
redhat (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total