---
title: "CVE-2026-56120: OpenRemote Manager: removeAlarms cross-realm IDOR (bulk delete)"
url: https://erroneo.us/security/cve/CVE-2026-56120/
description: "CVE-2026-56120 (io.openremote:openremote-manager (Maven)): OpenRemote Manager: removeAlarms cross-realm IDOR (bulk delete)"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-23
date_modified: 2026-09-24
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-56120"
kev: false
cvss: 9.6
epss: null
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-56120: OpenRemote Manager: removeAlarms cross-realm IDOR (bulk delete)

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog. That can change quickly after a public write-up; re-check if you are affected.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes io.openremote:openremote-manager (Maven) < 1.25.0, fixed in 1.25.0 . Check your lockfile, including transitive dependencies.

## What it is

OpenRemote Manager: removeAlarms cross-realm IDOR (bulk delete)

## Affected packages

- Maven `io.openremote:openremote-manager` < 1.25.0 → fixed: 1.25.0

## Severity

- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).

## Sources

- [GitHub Advisory GHSA-h3m5-97jq-qjrf](https://github.com/advisories/GHSA-h3m5-97jq-qjrf)
- [CVE.org record CVE-2026-56120](https://www.cve.org/CVERecord?id=CVE-2026-56120)
- [NVD entry CVE-2026-56120](https://nvd.nist.gov/vuln/detail/CVE-2026-56120)
- [github.com](https://github.com/openremote/openremote/security/advisories/GHSA-h3m5-97jq-qjrf)
- [github.com](https://github.com/openremote/openremote/blob/master/manager/src/main/java/org/openremote/manager/alarm/AlarmResourceImpl.java)
- [github.com](https://github.com/openremote/openremote/blob/master/manager/src/main/java/org/openremote/manager/alarm/AlarmService.java)
- [github.com](https://github.com/openremote/openremote/commit/9fad55e5a448c82772d241d395826e5d6fe1ce2d)
- [github.com](https://github.com/openremote/openremote/releases/tag/1.25.0)
- [vulncheck.com](https://www.vulncheck.com/advisories/openremote-idor-via-bulk-alarm-deletion-endpoint)

---
Source page: https://erroneo.us/security/cve/CVE-2026-56120/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt