CVE-2026-17107 — Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluster
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…
Published: 2026-07-24 · CVSS: 8.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7