CVE-2026-89060

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.

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Produits concernés

• Red Hat Advanced Cluster Management for Kubernetes 2.13
• Red Hat Advanced Cluster Management for Kubernetes 2.14
• Red Hat Advanced Cluster Management for Kubernetes 2.15
• Red Hat Advanced Cluster Management for Kubernetes 2.16
• Red Hat Advanced Cluster Management for Kubernetes 2.17

Scores CVSS

Faiblesses (CWE)

• CWE-551

Références

• https://access.redhat.com/errata/RHSA-2026:67539
• https://access.redhat.com/errata/RHSA-2026:67540
• https://access.redhat.com/errata/RHSA-2026:67541
• https://access.redhat.com/errata/RHSA-2026:67542
• https://access.redhat.com/errata/RHSA-2026:67543
• https://access.redhat.com/security/cve/CVE-2026-89060
• https://bugzilla.redhat.com/show_bug.cgi?id=2531596
• https://github.com/stolostron/multicluster-observability-addon/pull/644

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories