---
id: CVE-2026-110848
title: >-
  n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a
  prototype pollution vulnerability in the AI workflow builder, which merges
  workflow connections using node names as object members without checking for
  reserved …
summary: >-
  n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a
  prototype pollution vulnerability in the AI workflow builder, which merges
  workflow connections using node names as object members without checking for
  reserved …
severity: none
cwe:
  - CWE-1321
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:25.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110848'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-prototype-pollution-via-ai-workflow-builder-connection-merge
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-15T00:02:07.177Z'
---

## Overview

n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.