Unauthorized Access Vulnerability in Multicluster Engine by Red Hat
CVE-2026-73266

7.1HIGH

Key Information:

Vendor

Red Hat
Status
Multicluster Engine For Kubernetes
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73266?

A flaw in the clusterclaims-controller of the Multicluster Engine allows authenticated tenants to manipulate ClusterClaim labels. This vulnerability can potentially let a tenant force a cluster to join a ManagedClusterSet belonging to another tenant. This unauthorized access opens the door for the injection of policies and workloads into clusters, which can disrupt operations and compromise security across environments.

References

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

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.