CVE-2026-89060

Summary

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 Software

VendorProductVersion RangeStatus
0 < *affected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.131789126264 < *unaffected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.141789126262 < *unaffected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.151789126262 < *unaffected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.161789126267 < *unaffected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.171789126264 < *unaffected

Weaknesses

  • CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

Workarounds

Disable MCOA log-forwarding and tracing capabilities that use ClusterLogForwarder or OpenTelemetryCollector resources.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References