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.
History

Fri, 21 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat multicluster Engine For Kubernetes
Vendors & Products Redhat multicluster Engine For Kubernetes

Fri, 21 Aug 2026 03:00:00 +0000

Type Values Removed Values Added
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.
Title Clusterclaims-controller: clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no ownership check
First Time appeared Redhat
Redhat multicluster Engine
Weaknesses CWE-602
CPEs cpe:/a:redhat:multicluster_engine
Vendors & Products Redhat
Redhat multicluster Engine
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-21T02:43:36.017Z

Reserved: 2026-08-11T17:22:38.645Z

Link: CVE-2026-73267

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-21T03:16:39.080

Modified: 2026-08-21T03:16:39.080

Link: CVE-2026-73267

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T06:00:10Z