CVE-2026-81679: Openremote

High severity, CVSS 7.7. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenRemote versions before 1.28.0 contain a cross-realm information disclosure vulnerability in the Notification REST API that allows per-realm tenant administrators to read all tenants' sent notifications including message bodies. Attackers with read:admin credentials in one realm can submit a zero-parameter GET request to the notification endpoint to retrieve sensitive notification metadata and message content from all realms.

Affected products

• Openremote Openremote: before 1.28.0 (fixed in 1.28.0)

Published 2026-08-27. Last modified 2026-10-08.