---
id: CVE-2026-103251
title: >-
  n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before
  2.40.1 contain a validation bypass vulnerability in the community package
  installation handler for queue mode deployments
summary: >-
  n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before
  2.40.1 contain a validation bypass vulnerability in the community package
  installation handler for queue mode deployments. Attackers with Redis write
  access c…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: n8n-io
product: n8n
affected:
  - n8n < 1.123.80
  - n8n >= 2.0.0 < 2.39.6
  - n8n >= 2.40.0 < 2.40.1
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T11:17:19.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103251'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-fmmv-p585-7c8x'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-package-install-validation-bypass-via-pubsub
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T11:42:53.800Z'
---

## Overview

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication.

## Remediation

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