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VULNERABILITIES

CVE-2026-17107 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:46885 [email protected]
https://access.redhat.com/errata/RHSA-2026:47388 [email protected]
https://access.redhat.com/errata/RHSA-2026:47735 [email protected]
https://access.redhat.com/errata/RHSA-2026:47949 [email protected]
https://access.redhat.com/errata/RHSA-2026:47953 [email protected]

see all 9 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-441Unintended Proxy or Intermediary ('Confused Deputy')[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

25 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-17107
NVD Published Date:
Jul 24, 2026
NVD Last Modified:
Sep 8, 2026
Source:
[email protected]
CVE-2026-17107 Details - Not Deferred