CVE-2026-72769: n8n

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.

Affected products

• n8n n8n: before 1.123.67 (fixed in 1.123.67); from 2.0.0, before 2.31.5 (fixed in 2.31.5); version 2.32.0 only

Published 2026-08-11. Last modified 2026-09-18.