{"id":"CVE-2026-103245","title":"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","summary":"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 wit…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-347"],"vendor":"n8n-io","product":"n8n","affected":["n8n < 1.123.80","n8n >= 2.0.0 < 2.39.6","n8n >= 2.40.0 < 2.40.1"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T11:17:17.800","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103245","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-hwv9-jhc7-f7c4","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-missing-webhook-signature-verification","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-01T11:42:53.797Z","slug":"CVE-2026-103245","body":"## Overview\n\nn8n 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}