8.5
High
CVE-2026-17107 A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster Management for Kubernetes…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Multicluster Engine for Kubernetes | Versions not published | |
| multicluster engine for Kubernetes 2.10 1784342329 | earliest → < 1784342329 | 1784342329 |
| multicluster engine for Kubernetes 2.8 1784342329 | earliest → < 1784342329 | 1784342329 |
| multicluster engine for Kubernetes 2.9 1783278220 | earliest → < 1783278220 | 1783278220 |
| multicluster engine for Kubernetes 2.11 1784925025 | earliest → < 1784925025 | 1784925025 |
| multicluster engine for Kubernetes 2.6 1783985960 | earliest → < 1783985960 | 1783985960 |
| multicluster engine for Kubernetes 2.17 1784926298 | earliest → < 1784926298 | 1784926298 |
| multicluster engine for Kubernetes 2.1 1784342329 | earliest → < 1784342329 | 1784342329 |
| multicluster engine for Kubernetes 2.11.0 1784925025 | earliest → < 1784925025 | 1784925025 |
Show the other branch Hide the other branch
| Product | Affected versions | Fixed in |
|---|---|---|
| multicluster engine for Kubernetes 2.9.0 1783278220 | earliest → < 1783278220 | 1783278220 |
References
- RHSA-2026:46885 access.redhat.com
- RHSA-2026:47388 access.redhat.com
- RHSA-2026:47735 access.redhat.com
- RHSA-2026:47949 access.redhat.com
- RHSA-2026:47953 access.redhat.com
- RHSA-2026:47974 access.redhat.com
- RHSA-2026:48284 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2506771 bugzilla.redhat.com
Timeline
- Published
- Last modified
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