What is CVE-2026-73267?

CVE-2026-73267 is a high-severity vulnerability in Red Hat Multicluster Engine For Kubernetes, classified under CWE-602. CVSS score: 7.7/10. Published 2026-08-21.

How severe is CVE-2026-73267?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Red Hat Multicluster Engine For Kubernetes

CVE-2026-73267

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.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Red Hat Multicluster Engine For Kubernetes

Weakness classification (CWE)

CWE-602

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-73267?: CVE-2026-73267 is a high-severity vulnerability in Red Hat Multicluster Engine For Kubernetes, classified under CWE-602. CVSS score: 7.7/10. Published 2026-08-21.
How severe is CVE-2026-73267?: High severity. CVSS v3 base score is 7.7 out of 10.