CVE-2026-17107
Last modified
CVE-2026-17107 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | multicluster engine for Kubernetes 2.1 | All versions |
| Red Hat | multicluster engine for Kubernetes 2.11.0 | All versions |
| Red Hat | multicluster engine for Kubernetes 2.17 | All versions |
| Red Hat | multicluster engine for Kubernetes 2.6 | All versions |
| Red Hat | multicluster engine for Kubernetes 2.8 | All versions |
| Red Hat | multicluster engine for Kubernetes 2.9.0 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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