CVE-2026-890607.7HighCWE-551

CVE-2026-89060: Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references

Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13

Vendor fix available · Affected: Red Hat Advanced Cluster Management for Kubernetes 2.13 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.5%probability of exploitation in the next 30 days

41st percentile

050100

Higher than 41% of scored CVEs

7.7HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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 products6

From the CVE record. A product or version that is not listed is unknown, not unaffected.

multicluster-observability-addonVersions not stated
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13Versions not stated
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.14Versions not stated
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.15Versions not stated
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.16Versions not stated
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.17Versions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization · Access Control
Vendor: Red Hat
Published: September 2026
Band: Unlikely (under 1%), September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-89060 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.