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CVE-2026-56120 high CVSS 8.1

Vulnerability in io.openremote:openremote-manager (CVE-2026-56120)

Summary

Vulnerability in io.openremote:openremote-manager (CVE-2026-56120). Confidential information can be exposed externally. Exploitable via DELETE /api/smartcity/alarm. Mitigation: upgrade to 1.25.0 or later.

Original description

The description as published by the source.

Summary

OpenRemote Manager is vulnerable to a cross-tenant Insecure Direct
Object Reference (IDOR) in the bulk alarm deletion endpoint. An
authenticated user in any realm can delete alarms belonging to other
realms (tenants) by supplying arbitrary alarm IDs. The vulnerability
exists because the bulk removeAlarms() method only verifies that the
caller's own realm is active and accessible, but never checks whether
the targeted alarm IDs belong to the caller's realm before deleting
them.

This allows any user with alarm write permissions in their own realm
to permanently destroy alarm records — including safety-critical and
security alerts — belonging to any other tenant on the same OpenRemote
installation.

[Additional Information]
The singular removeAlarm() method correctly validates that the
target alarm's realm matches the caller's access:

// CORRECT (singular):
SentAlarm alarm = alarmService.getAlarm(alarmId);
if (!isRealmActiveAndAccessible(alarm.getRealm())) {
    throw new ForbiddenException(...);
}

The plural removeAlarms() method is missing this per-alarm realm
check and only validates the caller's own realm — a check that is
trivially satisfied for any authenticated user:

 // VULNERABLE (plural):
public void removeAlarms(RequestParams requestParams, List alarmIds) {
    if (!isRealmActiveAndAccessible(getAuthenticatedRealmName())) {  
        throw new ForbiddenException(...);  // always passes…

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-56120 has been found in io.openremote:openremote-manager.
Attackers can target a specific entry point like DELETE /api/smartcity/alarm over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade io.openremote:openremote-manager to 1.25.0 or later.
If unsure, ask your IT team or search "io.openremote:openremote-manager CVE-2026-56120" on the vendor's site.

CVE-2026-56120 (io.openremote:openremote-manager) — CWE-639 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Attack surface: DELETE /api/smartcity/alarm
Patched: 1.25.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-639) exists in io.openremote:openremote-manager. Attackers reach the vulnerable code path via DELETE /api/smartcity/alarm.

📍 Affected scope

Check the vendor advisory for the affected versions of io.openremote:openremote-manager. Attack surface: DELETE /api/smartcity/alarm.

🔥 Severity

Severity: High (CVSS 8.1/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 1.25.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual DELETE /api/smartcity/alarm requests with malformed payloads or SQL meta-characters. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで io.openremote:openremote-manager を使っているサービスとバージョンを洗い出す。

  2. 2
    Hunt for indicators of compromise detect 
    grep 'DELETE /api/smartcity/alarm' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'

    アクセスログで DELETE /api/smartcity/alarm への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。

  3. 3
    Apply patch patch 
    Upgrade io.openremote:openremote-manager to 1.25.0

    ステージング環境で 1.25.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。

  4. 4
    Post-deployment verification verify 
    Replay attack against DELETE /api/smartcity/alarm on staging to confirm patch closes the vector

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。

Affected packages

maven io.openremote:openremote-manager
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.0"}]}]

References

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