CVE-2026-17107

HIGH SEVERITY

CVSS Score & Metrics

Base Score

8.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

July 24, 2026

Last Modified

July 24, 2026

CWE ID

CWE-441

Source

NVD

Vendor

Red Hat

Product

Multicluster Engine for Kubernetes

External References

https://access.redhat.com/security/cve/CVE-2026-17107
https://bugzilla.redhat.com/show_bug.cgi?id=2506771

CVE-2026-17107

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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