8.5Alta
CVE-2026-17107Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluster
Descripción
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.
Debilidad (CWE):
CWE-441
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| multicluster engine | 2.10 | — | |
| multicluster engine | 2.11 | — | |
| multicluster engine | 2.17 | — | |
| multicluster engine | 2.6 | — | |
| multicluster engine | 2.8 | — | |
| multicluster engine | 2.9 | — | |
| Red Hat | multicluster engine for Kubernetes 2.10 | all versions | |
| Red Hat | multicluster engine for Kubernetes 2.11 | 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 | all versions |
Referencias y parches
- RHSA-2026:46885 vendor-advisory
- RHSA-2026:47388 vendor-advisory
- RHSA-2026:47735 vendor-advisory
- RHSA-2026:47949 vendor-advisory
- RHSA-2026:47953 vendor-advisory
- RHSA-2026:47974 vendor-advisory
- RHSA-2026:48284 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-17107 vdb-entry
- RHBZ#2506771 issue-tracking