CVE-2026-89054 | OpenNMS Group Horizon up to 36.0.3 REST API /api/v2 improper authorization

September 10, 2026 Yanac

A vulnerability has been found in OpenNMS Group Horizon up to 36.0.3 and classified as critical. Impacted is an unknown function of the file /api/v2 of the component REST API. The manipulation leads to improper authorization.

This vulnerability is traded as CVE-2026-89054. It is possible to initiate the attack remotely. There is no exploit available.

The affected component should be upgraded.VulDB Recent EntriesRead More