CVE-2026-73266
Clusterclaims-controller: confused deputy: tenant-controlled clusterclaim labels propagated to managedcluster, enabling cross-tenant managedclusterset join
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:HConfidentialityHigh
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
Red Hat
commercial·US
Exploitability
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:59556
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:59557
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:59558
access.redhat.com
and 5 more references View all →
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