Intel

AIKIDO-2025-10346

n8n-nodes-base is vulnerable to Prototype Pollution

Prototype Pollution Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.

70

High Risk

This Affects:

JSn8n-nodes-base
1.55.0 - 1.94.1
Fixed in 1.95.0

TL;DR

Affected versions of this package are vulnerable to prototype pollution due to inadequate validation of object keys. Although forbidden keys are validated, this check can be bypassed with a nested object containing those keys. An attacker could exploit this by crafting a JSON payload that pollutes the prototype chain, allowing them to inject properties into all objects in the application, potentially leading to remote code execution or other security issues.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

n8n-nodes-base is vulnerable to Prototype Pollution in versions 1.55.0 - 1.94.1.

How to fix this

Upgrade the n8n-nodes-base library to the patch version.