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). 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.
- 🔗 access.redhat.com/security/cve/CVE-2026-73266
- 🔗 bugzilla.redhat.com/show_bug.cgi
- 🔗 access.redhat.com/errata/RHSA-2026:59556
- 🔗 access.redhat.com/errata/RHSA-2026:59557
- 🔗 access.redhat.com/errata/RHSA-2026:59558
- 🔗 access.redhat.com/errata/RHSA-2026:59559
- 🔗 access.redhat.com/errata/RHSA-2026:59579
- 🔗 access.redhat.com/errata/RHSA-2026:59593
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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). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a Managed