PT-2026-64408 · Red Hat · Multicluster Engine For Kubernetes

CVE-2026-17107 · Published 2026-07-24 · Updated 2026-07-24

Mitre

CVSS v3.1

8.5

High

Base vector

AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Fix

Weakness Enumeration

CWE-441

Related Identifiers

CVE-2026-17107

Affected Products

Multicluster Engine For Kubernetes

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-17107 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2506771 · Note
• https://access.redhat.com/security/cve/CVE-2026-17107 · Note