Is CVE-2026-17107 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-17107?

CVE-2026-17107 has a CVSS v3 severity of HIGH (8.5).

Back

CVE-2026-17107

Description

A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster Management for Kubernetes (RHACM) and multicluster-engine (MCE). The service-proxy appends impersonation group headers to proxied requests without first removing caller-supplied values, and the spoke ServiceAccount holds unrestricted impersonation permissions. An authenticated hub principal can inject an Impersonate-Group header to escalate to cluster-admin on every managed cluster.