CVE-2026-77083

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-20 12:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-01 19:49 UTC Last updatedMost recent change to the record

Details

Published

2026-08-20 12:16 UTC

Last modified

2026-09-01 19:49 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-1321 · Prototype pollution

Record status

Analyzed

Affected

• n8n < 1.123.69
• n8n < 2.33.4
• n8n 2.34.0

Attack profile CVSS 4.0 · 6.0

Attack vector

Network

Complexity

High

Attack requirements

Present

Privileges needed

Low

User interaction

None

Confidentiality

High

Integrity

Low

Availability

None