---
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: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-1321
vendor: n8n-io
product: n8n
affected:
  - n8n < 1.123.83
  - n8n >= 2.0.0 < 2.41.4
  - n8n >= 2.42.0 < 2.42.1
published: '2026-10-14'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:17:33.780'
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
  - cve.org
epss: 0.00312
epssPercentile: 0.23974
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T16:31:15.592926Z'
cvssSource: cna
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.