Vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2
CVE-2026-89060
A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference Secrets, the add-on may copy the referenced Secrets to the attacker-controlled managed cluster.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2026-89060?
- CVE-2026-89060 is a high-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under CWE-551. CVSS score: 7.7/10. Published 2026-09-11.
- How severe is CVE-2026-89060?
- High severity. CVSS v3 base score is 7.7 out of 10.