CVE-2026-17107 (GCVE-0-2026-17107)

Vulnerability from cvelistv5 – Published: 2026-07-24 18:56 – Updated: 2026-07-24 18:56
VLAI
Title
Cluster-proxy: cluster-proxy: impersonation header injection in service-proxy grants cluster-admin on every managed cluster
Summary
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.
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-17107 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2506771 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
 Create a notification for this product.
Date Public
2026-07-24 18:49
Credits
Red Hat would like to thank Arpit Jain and Kahiro Okina (Craftsman Software, Inc.) for reporting this issue.
Show details on NVD website
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