CVE WatchAug 21, 2026

CVE-2026-73267

A flaw was found in the clusterclaims-controller component of multicluster engine (MCE). A tenant with standard permissions to create and de

CVSS

7.7

High

EPSS

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KEV

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Exploit Today

0-100

Published: Aug 21, 2026 · Last modified: Aug 21, 2026 · CWE-602

EPSS · 30d

Not enough EPSS history yet.

Technical description

A flaw was found in the clusterclaims-controller component of multicluster engine (MCE). A tenant with standard permissions to create and delete ClusterClaim resources can exploit this by manipulating the `spec.namespace` field. This allows the tenant to specify and delete any ManagedCluster, including the hub's local-cluster or other tenants' clusters, due to a missing ownership check. This vulnerability can lead to a denial of service by enabling unauthorized deletion of ManagedClusters.

Official references

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