---
id: CVE-2026-103245
title: >-
  n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before
  2.40.1 fail to verify the x-webflow-signature HMAC in the Webflow Trigger node
  webhook handler
summary: >-
  n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before
  2.40.1 fail to verify the x-webflow-signature HMAC in the Webflow Trigger node
  webhook handler. Unauthenticated attackers can send forged webhook requests
  wit…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-347
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: '2026-10-01T11:17:17.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103245'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-hwv9-jhc7-f7c4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-missing-webhook-signature-verification
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T11:42:53.797Z'
---

## Overview

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 fail to verify the x-webflow-signature HMAC in the Webflow Trigger node webhook handler. Unauthenticated attackers can send forged webhook requests with attacker-controlled payloads to trigger workflows and manipulate downstream actions like record creation or API calls.

## Remediation

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