Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / multicluster engine for Kubernetes 2.10 | unaffected 1784342329 before * |
| Red Hat / multicluster engine for Kubernetes 2.10 | unaffected 1784342329 before * |
| Red Hat / multicluster engine for Kubernetes 2.11 | unaffected 1784925025 before * |
| Red Hat / multicluster engine for Kubernetes 2.17 | unaffected 1784926298 before * |
| Red Hat / multicluster engine for Kubernetes 2.6 | unaffected 1783985960 before * |
| Red Hat / multicluster engine for Kubernetes 2.8 | unaffected 1784342329 before * |
| Red Hat / multicluster engine for Kubernetes 2.9 | unaffected 1783278220 before * |
CWE
CWE-441
References
- https://access.redhat.com/errata/RHSA-2026:46885
- https://access.redhat.com/errata/RHSA-2026:47388
- https://access.redhat.com/errata/RHSA-2026:47735
- https://access.redhat.com/errata/RHSA-2026:47949
- https://access.redhat.com/errata/RHSA-2026:47953
- https://access.redhat.com/errata/RHSA-2026:47974
- https://access.redhat.com/errata/RHSA-2026:48284
- https://access.redhat.com/security/cve/CVE-2026-17107
- https://bugzilla.redhat.com/show_bug.cgi?id=2506771
ADP enrichment
No English description supplied.
No references supplied.