CVE-2026-73266 (GCVE-0-2026-73266)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:36 – Updated: 2026-08-13 16:36
VLAI
Title
Clusterclaims-controller: clusterclaims-controller: tenant-controlled clusterclaim labels propagated to managedcluster enabling cross-tenant managedclusterset join
Summary
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.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
CWE
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-73266 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2514217 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
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Date Public
2026-08-11 00:00
Show details on NVD website
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