CVE-2026-89060
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
- State
- Published
- Severity
- 7.7 High
- Published
- Sep 11, 2026
- Updated
- Sep 21, 2026
- Reserved
- Sep 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat |
Weaknesses
- CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Affected Products
| Product | Versions |
|---|---|
multicluster-observability-addon |
|
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 2.17Red Hat |
|
References
- RHSA-2026:67539vendor-advisory
- RHSA-2026:67540vendor-advisory
- RHSA-2026:67541vendor-advisory
- RHSA-2026:67542vendor-advisory
- RHSA-2026:67543vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-89060vdb-entry
- RHBZ#2531596issue-tracking
- https://github.com/stolostron/multicluster-observability-addon/pull/644
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