CVE-2026-17107

highCVSS 8.5covered by 1 sourcefirst seen 2026-07-24

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.

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Exploitation outlook

Low exploitation risk0.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-17107: A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster…nvd · 2026-07-24

External references

NVD record for CVE-2026-17107

CVE.org record

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