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NVD HIGH: CVE-2026-73266 — A flaw was found in the clusterclaims-controller component of Multicluster Engin...

·Source: NIST NVD

Updated:

Executive Summary

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.

Analysis

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. CVSS Score: 7.1. Published: 2026-08-13T17:17:35.713.

Indicators of Compromise (1)

CVE (1)
CVE-2026-73266
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 13, 2026. Verified by: NIST.

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