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Advisories

n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification

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severity
medium
date
Affecting

  • n8n >= 0, < 1.123.80

  • n8n >= 2.0.0, < 2.39.6

  • n8n >= 2.40.0, < 2.40.1

CWE
  • CWE-347 Improper Verification of Cryptographic Signature
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Description
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.

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