---
id: CVE-2026-81679
title: >-
  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
summary: >-
  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. Attac…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-200
published: '2026-08-27'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:42.600'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81679'
references:
  - url: >-
      https://github.com/openremote/openremote/security/advisories/GHSA-6ff4-4frc-r287
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openremote-before-1.28.0-cross-realm-information-disclosure-via-notification-api
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00392
epssPercentile: 0.30551
ingestedAt: '2026-09-23T17:28:14.808Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.