Vulnerability in N8n-Io N8n
CVE-2026-103245
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-hwv9-jhc7-f7c4 (vendor-advisory)
- www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-missing-webh… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103245?
- CVE-2026-103245 is a medium-severity vulnerability in N8n-Io N8n, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.3/10. Published 2026-10-01.
- How severe is CVE-2026-103245?
- Medium severity. CVSS v3 base score is 5.3 out of 10.