CVE-2026-73266
CVE-2026-73266: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.1
High [CVE-2026-73266] tenant-controlled ClusterClaim labels propagated to ManagedCluster enabling cross-tenant ManagedClusterSet join
CVE-2026-73266Source published Source updated
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. This Important flaw in Multicluster Engine for Kubernetes' clusterclaims-controller allows a tenant to propagate arbitrary labels from a ClusterClaim to a ManagedCluster object. This enables unauthorized cross-tenant ManagedClusterSet joins, leading to policy and workload injection into victim clusters. The vulnerability breaks tenant isolation, granting an attacker control over resources belonging to other…
- Affected products in this advisory
- multicluster engine for Kubernetes 2.11
- multicluster engine for Kubernetes 2.17
- multicluster engine for Kubernetes 2.6
- multicluster engine for Kubernetes 2.8
1 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- multicluster-engine/clusterclaims-controller-rhel9:1787196014
- multicluster-engine/clusterclaims-controller-rhel9:1787239442
- multicluster-engine/clusterclaims-controller-rhel9:1786577950
- multicluster-engine/clusterclaims-controller-rhel9:1787259112
8 more entries in the full advisory.
- Mitigation guidance
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Android app · Google Play
Monitor future Red Hat CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.