CVE-2026-103245CWE-347

CVE-2026-103245

Medium · published October 1, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
4.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · 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
EPSS
0.00157 · 4.4th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-hwv9-jhc7-f7c4 · [email protected]https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-missing-webhook-signature-verification · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:41Z
    n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification
    cvelistv5