CVE-2026-72769

HighCVSS 8.1/10Last modified Oct 29, 2026

Description

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-1321

Affected software

Vendor	Product	Versions
n8n-io	n8n	< 1.123.67
n8n-io	n8n	>= 2.32.0, < 2.32.1
n8n-io	n8n	>= 2.0.0-rc.0, < 2.31.5

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vhMitigation, Vendor Advisory
https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-vm-expression-engineThird Party Advisory

Timeline

Published: Aug 11, 2026
Last modified: Oct 29, 2026
NVD status: Analyzed

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