7.7High
CVE-2026-73267Clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no local ownership check
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.
Weakness (CWE):
CWE-602
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| multicluster engine | 2.10 | — | |
| multicluster engine | 2.11 | — | |
| multicluster engine | 2.17 | — | |
| multicluster engine | 2.6 | — | |
| multicluster engine | 2.8 | — | |
| multicluster engine | 2.9 | — | |
| Red Hat | multicluster engine for Kubernetes 2.10 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.11 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.17 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.6 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.8 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.9 | all versions |
References and patches
- RHSA-2026:59556 vendor-advisory
- RHSA-2026:59557 vendor-advisory
- RHSA-2026:59558 vendor-advisory
- RHSA-2026:59559 vendor-advisory
- RHSA-2026:59579 vendor-advisory
- RHSA-2026:59593 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-73267 vdb-entry
- RHBZ#2514218 issue-tracking