{"id":"CVE-2026-56360","aliases":["GHSA-38c7-23hj-2wgq"],"url":"https://o3.security/vulnerability/CVE-2026-56360","summary":"n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger","details":"n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.","published":"2026-07-08T13:49:03.453Z","modified":"2026-08-12T03:51:17.706830156Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"n8n","fixedVersion":"1.123.18"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.6.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56360.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56360"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.706830156Z"}}