HIGHpublic-safe

CVE-2026-17107

NVD: 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). NVD: The service-proxy appends impersonation group headers to proxied requests without first removing caller-supplied values, and the spoke ServiceAccount holds unrestricted impersonation permissions. NVD: An authenticated hub principal can inject an Impersonate-Group header to escalate to cluster-admin on every managed cluster.

CVSS
8.5 Severity
HIGH EPSS
0.0035 (27) KEV
-

Source-published summary

Possible impact

This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for high severity review.

Affected context

Affected product or version requires source confirmation.

Remediation / advisory

Remediation reference present; patch status requires confirmation in the linked advisory.

Why it matters

This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for high severity review.; CVSS 8.5 (HIGH); EPSS percentile 27; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD.

What to verify

Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.

Exposure hint

exposure unknown

Impact tags

明示タグなし

Urgency reasons

CVSS HIGHvendor advisory presentrecent updateremediation reference present

Source-derived note

Summary derived from NVD description; unsafe procedural detail is not shown.

Redaction metadata

source summary used: True
fallback summary used: False
unsafe procedural detail present: false
raw source displayed: false
public summary redacted: true

Remediation handoff

Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.

Handoff JSON Handoff Markdown Safe Codex prompt

Safety note

This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.