CVE WatchAug 9, 2026

CVE-2026-17107

A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster Management for Kubernetes (RHACM) and multicl

CVSS

8.5

High

EPSS

0.3%

p27

KEV

—

Exploit Today

0-100

Published: Jul 24, 2026 · Last modified: Aug 9, 2026 · CWE-441

EPSS · 30d

0.2%EPSS · 30 days0.3%

2026-07-252026-08-08

Technical 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.

Official references

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