CVE-2026-103245: n8n-Io n8n

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• n8n-Io n8n: before 1.123.80 (fixed in 1.123.80); from 2.0.0, before 2.39.6 (fixed in 2.39.6); from 2.40.0, before 2.40.1 (fixed in 2.40.1)

Published 2026-10-01. Last modified 2026-10-01.