CVE-2026-10059
Critical
Description
A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a token for a ServiceAccount with cluster-wide administrative authority. This leads to a privilege escalation, allowing the tenant administrator to gain full control over the cluster.
SeverityCritical
CVSS9.1
Exploit probability—
ProductMulticluster Engine 2.10
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-266CWE-266
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 2.6 | No range specified | — |
| multicluster_engine 2.8 | No range specified | — |
| multicluster_engine 2.9 | No range specified | — |
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