n8n — Sandbox Escape (CVE-2026-42234)
Date: 2026-05
Affected: n8n/n8n
Attack vector: sandbox-escape
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2026-42234
CWE: CWE-94
CVSS: 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with permission to create or modify workflows containing a Python Code Node could escape the sandbox and achieve arbitrary code execution on the task runner container. This issue only affects instances where the Python Task Runner is enabled. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.


Mitigations:

Architectural layers (MAESTRO):