---
id: CVE-2026-116811
title: OpenPanel before 3.0.0 Sandbox Escape RCE via Webhook JavaScript Template
summary: >-
  OpenPanel before 3.0.0 contains a sandbox escape vulnerability in the
  js-runtime validator that allows a project member to bypass the AST allowlist
  by aliasing the Function constructor. Attackers with write access can read
  payload.constr…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-94
vendor: Openpanel-dev
product: openpanel
affected:
  - openpanel < 3.0.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-31T02:08:26.250320Z'
exploitAvailable: true
published: '2026-10-26'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T02:08:36.588Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116811'
references:
  - url: >-
      https://github.com/Openpanel-dev/openpanel/security/advisories/GHSA-mc99-9jf5-22cq
    label: GitHub Security Advisory (GHSA-mc99-9jf5-22cq)
  - url: >-
      https://github.com/Openpanel-dev/openpanel/commit/42fc8623b5c5c30f0b89686451c0c5ab13046b81
  - url: >-
      https://www.vulncheck.com/advisories/openpanel-before-3.0.0-sandbox-escape-rce-via-webhook-javascript-template
    label: >-
      VulnCheck Advisory: OpenPanel before 3.0.0 Sandbox Escape RCE via Webhook
      JavaScript Template
tags:
  - cve.org
  - exploit-available
epss: 0.00494
epssPercentile: 0.4252
ingestedAt: '2026-10-27T16:11:59.143Z'
---

## Overview

OpenPanel before 3.0.0 contains a sandbox escape vulnerability in the js-runtime validator that allows a project member to bypass the AST allowlist by aliasing the Function constructor. Attackers with write access can read payload.constructor.constructor into a local and call it to run arbitrary code in the worker process.

## Affected

- `openpanel < 3.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.