What is GHSA-xp42-v53j-r9gh?

GHSA-xp42-v53j-r9gh is a security advisory published by GitHub Security Advisories with High severity. A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An...

Which CVE IDs does GHSA-xp42-v53j-r9gh cover?

GHSA-xp42-v53j-r9gh covers the following CVE IDs: CVE-2026-73266. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-xp42-v53j-r9gh?

GHSA-xp42-v53j-r9gh has a CVSS v3 base score of 7.1, published by GitHub Security Advisories.

GHSA-xp42-v53j-r9ghHighCVSS 7.1

A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An...

Vendor

GitHub Security Advisories

Published

August 13, 2026

Last Modified

August 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-73266 →

📋 Description

A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a ManagedClusterSet belonging to another tenant. Such unauthorized access could enable the injection of policies and workloads into other tenants' clusters.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-73266
https://access.redhat.com/security/cve/CVE-2026-73266
https://bugzilla.redhat.com/show_bug.cgi?id=2514217
https://github.com/advisories/GHSA-xp42-v53j-r9gh