CVE-2026-89060highCWE-551

CVE-2026-89060: high-severity vulnerability in multicluster-observability-addon

Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.7epss 0.5%
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:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected products
multicluster-observability-addonRed Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.14Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.15Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.16Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.17
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