CVE-2026-73266

HighCVSS 7.1/10Last modified Sep 29, 2026

Description

A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a ManagedClusterSet belonging to another tenant. Such unauthorized access could enable the injection of policies and workloads into other tenants' clusters.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Weakness enumeration

CWE-441

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Red Hat	multicluster engine for Kubernetes 2.10	—
Red Hat	multicluster engine for Kubernetes 2.11	—
Red Hat	multicluster engine for Kubernetes 2.17	—
Red Hat	multicluster engine for Kubernetes 2.6	—
Red Hat	multicluster engine for Kubernetes 2.8	—
Red Hat	multicluster engine for Kubernetes 2.9	—

References

Timeline

Published: Aug 13, 2026
Last modified: Sep 29, 2026
NVD status: Awaiting Analysis

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