VDB

CVE-2026-17107

CVE-2026-17107 PUBLISHED CVSS 8.5 HIGH

Reported by redhat · Published July 24, 2026

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.

Risk scores

CVSS 3.1
8.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

VendorProductVersions
Red Hatmulticluster engine for Kubernetes 2.101784342329
Red Hatmulticluster engine for Kubernetes 2.101784342329
Red Hatmulticluster engine for Kubernetes 2.111784925025
Red Hatmulticluster engine for Kubernetes 2.171784926298
Red Hatmulticluster engine for Kubernetes 2.61783985960
Red Hatmulticluster engine for Kubernetes 2.81784342329
Red Hatmulticluster engine for Kubernetes 2.91783278220
Red Hatmulticluster engine for Kubernetes 2.11784342329
Red Hatmulticluster engine for Kubernetes 2.101784342329
Red HatMulticluster Engine for Kubernetes
Red Hatmulticluster engine for Kubernetes 2.61783985960
Red Hatmulticluster engine for Kubernetes 2.111784925025
Red Hatmulticluster engine for Kubernetes 2.11.01784925025
Red Hatmulticluster engine for Kubernetes 2.9.01783278220
Red Hatmulticluster engine for Kubernetes 2.91783278220
Red Hatmulticluster engine for Kubernetes 2.171784926298
Red Hatmulticluster engine for Kubernetes 2.81784342329

Timeline

  • Jul 24, 2026 CVE Published
  • Jul 25, 2026 EPSS Score (26 in total, the first dated here)
  • Aug 19, 2026 CVE Updated
  • Sep 30, 2026 Distribution Patch (7 in total, the first dated here)
  • Sep 30, 2026 Security Advisory (7 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-17107
vulnetix vdb fixes CVE-2026-17107

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-17107/fixes/registry"

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References

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