{"id":"CVE-2026-56360","revision":"a6979405601b464186c8bcf851eefaf8","records":[{"revision":"a6979405601b464186c8bcf851eefaf8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-56360","aliases":[],"title":"n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger","description":"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.","state":0,"publishedAt":"2026-07-08T13:49:03.453+00:00","modifiedAt":"2026-07-08T14:26:33.242+00:00","affected":[{"ecosystem":"Vendor product","name":"n8n","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n8n\",\n                    \"product\": \"n8n\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/n8n\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"1.123.18\"\n                        },\n                        {\n                            \"version\": \"1.123.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.6.2\"\n                        },\n                        {\n                            \"version\": \"2.6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","score":4,"severity":"MEDIUM"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq","https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56360","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-56360","identifiers":["CVE-2026-56360"]},"retained":false,"historicalAffected":[]}],"coverage":[]}