Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | multicluster-observability-addon | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.13 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.14 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.15 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — |
References
- RHSA-2026:67539 vendor-advisory
- RHSA-2026:67540 vendor-advisory
- RHSA-2026:67541 vendor-advisory
- RHSA-2026:67542 vendor-advisory
- RHSA-2026:67543 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-89060 vdb-entry
- RHBZ#2531596 issue-tracking
- https://github.com/stolostron/multicluster-observability-addon/pull/644