All vulnerabilities
CVE-2026-103245GHSA-hwv9-jhc7-f7c4

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

n8n-io n8nFrameworks
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.16%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.123.80Also 2.39.6, 2.40.1CVE List
Published1 Oct 2026Updated 1 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 3

  • n8naffected: all versions before 1.123.80CVE List
  • n8naffected: 2.0.0 before 2.39.6CVE List
  • n8naffected: 2.40.0 before 2.40.1CVE List

References 2