CVE-2026-73267
High
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.
SeverityHigh
CVSS7.7
Exploit probability—
ProductMulticluster Engine 2.10
PublishedAug 21, 2026
First seenAug 21, 2026
Weakness typeCWE-602CWE-602
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| multicluster_engine 2.10 | No range specified | — |
| multicluster_engine 2.11 | No range specified | — |
| multicluster_engine 2.17 | No range specified | — |
| multicluster_engine 2.6 | No range specified | — |
| multicluster_engine 2.8 | No range specified | — |
| multicluster_engine 2.9 | No range specified | — |
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