Expression Injection Vulnerabilities in OpenRemote IoT Platform
CVE-2026-39842

10CRITICAL

Key Information:

Vendor

Openremote

Status
Openremote
Vendor
CVE Published:
14 April 2026

What is CVE-2026-39842?

The OpenRemote IoT platform, specifically versions 1.21.0 and below, is impacted by two related expression injection vulnerabilities. These flaws exist within the rules engine, allowing unauthorized users to execute arbitrary code on the server. The JavaScript rules engine processes user-defined scripts via Nashorn's ScriptEngine.eval() without adequate sandboxing or security checks. This oversight enables attackers with the write:rules role to create JavaScript rulesets that can run with full Java Virtual Machine (JVM) access. Consequently, this can lead to remote code execution at the root level, unauthorized file access, and potential data exposure including sensitive information like database credentials. Although there are security filters for Groovy rules, they remain ineffective due to improper registration. This vulnerability has been addressed in version 1.22.0.

Affected Version(s)

openremote < 1.22.0

References

https://github.com/openremote/openremote/security/advisor...
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https://github.com/openremote/openremote/releases/tag/1.22.0
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CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.