High severity7.1NVD Advisory· Published Aug 13, 2026· Updated Sep 8, 2026
CVE-2026-73266
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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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
8- access.redhat.com/errata/RHSA-2026:59556nvd
- access.redhat.com/errata/RHSA-2026:59557nvd
- access.redhat.com/errata/RHSA-2026:59558nvd
- access.redhat.com/errata/RHSA-2026:59559nvd
- access.redhat.com/errata/RHSA-2026:59579nvd
- access.redhat.com/errata/RHSA-2026:59593nvd
- access.redhat.com/security/cve/CVE-2026-73266nvd
- bugzilla.redhat.com/show_bug.cginvd
News mentions
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