CVE-2026-10059 Privilege escalation in multicluster engine for Kubernetes 2.1
Namespace administrators can escalate to cluster-wide authority by creating a ClusterCurator resource, gaining full control over the Kubernetes cluster.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10059?
CVE-2026-10059 is a critical vulnerability in Red Hat multicluster engine for Kubernetes 2.1, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-266
Which versions are affected by CVE-2026-10059?
How do I fix CVE-2026-10059?
No fix has been published for CVE-2026-10059 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-10059 being exploited?
There is no known exploitation of CVE-2026-10059 in the wild and no public exploit code.
Sources
Also known as GHSA-f7c4-3r82-969w.