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CVE-2026-39842— OpenRemote is Vulnerable to Expression Injection

Quick assessment

Affected
openremote openremote
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenRemote是OpenRemote开源的一个开源物联网平台。 OpenRemote 1.22.0之前版本存在安全漏洞，该漏洞源于规则引擎中存在两个相互关联的表达式注入，可能导致服务器上的任意代码执行。

CVSS 10.0 · Critical EPSS 0.92% · P58
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I. Basic Information for CVE-2026-39842

Vulnerability Information
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Vulnerability Title
OpenRemote is Vulnerable to Expression Injection
Source: CVE Program / CVE List V5
Vulnerability Description
OpenRemote is an open-source IoT platform. Versions 1.21.0 and below contain two interrelated expression injection vulnerabilities in the rules engine that allow arbitrary code execution on the server. The JavaScript rules engine executes user-supplied scripts via Nashorn's ScriptEngine.eval() without sandboxing, class filtering, or access restrictions, and the authorization check in RulesResourceImpl only restricts Groovy rules to superusers while leaving JavaScript rules unrestricted for any user with the write:rules role. Additionally, the Groovy rules engine has a GroovyDenyAllFilter security filter that is defined but never registered, as the registration code is commented out, rendering the SandboxTransformer ineffective for superuser-created Groovy rules. A non-superuser attacker with the write:rules role can create JavaScript rulesets that execute with full JVM access, enabling remote code execution as root, arbitrary file read, environment variable theft including database credentials, and complete multi-tenant isolation bypass to access data across all realms. This issue has been fixed in version 1.22.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenRemote 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenRemote是OpenRemote开源的一个开源物联网平台。 OpenRemote 1.22.0之前版本存在安全漏洞，该漏洞源于规则引擎中存在两个相互关联的表达式注入，可能导致服务器上的任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
openremote openremote < 1.22.0 -

II. Public POCs for CVE-2026-39842

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III. Intelligence Information for CVE-2026-39842

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Vendor Advisories for CVE-2026-39842 (1)

Vendor Pages for CVE-2026-39842 (1)

IV. Related Vulnerabilities

Same product: openremote
Same vendor: openremote
Same weakness: CWE-94

V. Comments for CVE-2026-39842

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