A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). (CVE-2026-73266)
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.
A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). (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.
CVSS v3.1
Score 7.1high
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xp42-v53j-r9gh
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73266"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Patch Information
Threat ID: 6a9d7639acd9273b49d80afe
Added to database: 09/06/2026, 14:18:33 UTC
Last updated: 09/06/2026, 15:22:12 UTC
Views: 4
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