CVE-2026-89060 Missing authorization in Red Hat Advanced Cluster Management for Kubernetes 2.13
Attackers with ManagedClusterAddOn modification rights can exfiltrate secrets from other namespaces by referencing unauthorized resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89060?
CVE-2026-89060 is a high-severity missing authorization vulnerability in Red Hat Advanced Cluster Management for Kubernetes 2.13, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-551
Which versions are affected by CVE-2026-89060?
How do I fix CVE-2026-89060?
No fix has been published for CVE-2026-89060 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-89060 being exploited?
There is no known exploitation of CVE-2026-89060 in the wild and no public exploit code.
Sources
Also known as GHSA-39w5-9x42-rwmr.