Vulnerability Description
n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules being available as allowlisted imports in the deployment's configuration. The issue is fixed in versions 1.123.69, 2.33.4, and 2.34.1.
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-c9c6-rq46-h25v
- https://www.vulncheck.com/advisories/n8n-before-code-node-sandbox-escape-via-fun
FAQ
What is CVE-2026-77083?
CVE-2026-77083 is a documented vulnerability. n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticat...
How severe is CVE-2026-77083?
CVSS scoring is not yet available for CVE-2026-77083. Check NVD for updates.
Is there a patch for CVE-2026-77083?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.