CVE-2026-93985: OpenPanel js-runtime JavaScript Template Sandbox Escape RCE
OpenPanel js-runtime through commit bad75bdd contains a sandbox escape vulnerability in the JavaScript webhook template validator that fails to block computed member access to constructor chains. Attackers with project write access can create webhook templates using computed property notation to access Function constructor and execute arbitrary code in the worker process.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs project write access. They can create a webhook template that uses computed property notation to reach the Function constructor.
What is the impact of successful exploitation?
Successful exploitation allows arbitrary code execution in the worker process. The listed impact includes high confidentiality, integrity, and availability effects, with scope changed.
How can I determine whether a deployment is affected?
Deployments using OpenPanel js-runtime through commit bad75bdd are affected. Review whether untrusted or insufficiently trusted users have project write access and can create webhook templates.