Advisoriesby IbisRed HatCVE-2026-17107
A flaw was found in the cluster-proxy service-proxy component used in Red Hat...
No fix yet
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 versions
The source does not list versions here. See the source advisory for affected products and fixes.
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-441
- www.cve.org/CVERecord?id=CVE-2026-17107
- nvd.nist.gov/vuln/detail/CVE-2026-17107
- access.redhat.com/errata/RHSA-2026:46885
- access.redhat.com/errata/RHSA-2026:47388
- access.redhat.com/errata/RHSA-2026:47735
- access.redhat.com/errata/RHSA-2026:47949
- access.redhat.com/errata/RHSA-2026:47953
- access.redhat.com/errata/RHSA-2026:47974
- access.redhat.com/errata/RHSA-2026:48284
- access.redhat.com/security/cve/CVE-2026-17107
- bugzilla.redhat.com/show_bug.cgi?id=2506771