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.

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Produits concernés

• Red Hat multicluster engine for Kubernetes 2.10
• Red Hat multicluster engine for Kubernetes 2.11
• Red Hat multicluster engine for Kubernetes 2.17
• Red Hat multicluster engine for Kubernetes 2.6
• Red Hat multicluster engine for Kubernetes 2.8
• Red Hat multicluster engine for Kubernetes 2.9

Scores CVSS

Faiblesses (CWE)

• CWE-441

Références

• https://access.redhat.com/errata/RHSA-2026:59556
• https://access.redhat.com/errata/RHSA-2026:59557
• https://access.redhat.com/errata/RHSA-2026:59558
• https://access.redhat.com/errata/RHSA-2026:59559
• https://access.redhat.com/errata/RHSA-2026:59579
• https://access.redhat.com/errata/RHSA-2026:59593
• https://access.redhat.com/security/cve/CVE-2026-73266
• https://bugzilla.redhat.com/show_bug.cgi?id=2514217

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories