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    CVE-2026-89060

    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.

    Published:Sep 10, 2026
    Last Modified:Sep 21, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00231
    CVSS Score:7.7

    Affected Products

    Vendor
    Redhat
    Product
    Acm
    Vendor
    Redhat
    Product
    Advanced Cluster Management For Kubernetes

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High