High 8.8Published Oct 26, 2026

CVE-2026-116811OpenPanel before 3.0.0 Sandbox Escape RCE via Webhook JavaScript Template

Updated under an hour ago (Oct 29, 2026, 1:50 PM ET)

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It affects Openpanel-dev openpanel. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

Openpanel-dev openpanel openpanel_dev:openpanel (from the name)	before 3.0.0; 3.0.0 not affected	CNA record

References

References

https://github.com/Openpanel-dev/openpanel/security/advisories/GHSA-mc99-9jf5-22cq	vendor-advisory
https://github.com/Openpanel-dev/openpanel/commit/42fc8623b5c5c30f0b89686451c0c5ab13046b81	patch
https://www.vulncheck.com/advisories/openpanel-before-3.0.0-sandbox-escape-rce-via-webhook-javascript-template	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.