{"id":"CVE-2026-56360","revision":null,"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. 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Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Restrict network access to the n8n webhook endpoint to known Zendesk IP ranges.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","state":0,"publishedAt":"2026-02-26T22:47:06+00:00","modifiedAt":"2026-07-09T04:11:38.1938529+00:00","affected":[{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.123.18"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.0.0"},{"kind":"fixed","version":"2.6.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","score":null,"severity":null},{"system":"CVSS_V4","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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq","https://github.com/n8n-io/n8n/commit/3839e310bd4c3002c646c363d1411916fa195151","https://github.com/n8n-io/n8n/commit/c6520e4e87614fa60c9433e93019e211f19f65f9","https://github.com/n8n-io/n8n"],"sourceUrl":"https://github.com/advisories/GHSA-38c7-23hj-2wgq","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-38c7-23hj-2wgq","identifiers":["GHSA-38c7-23hj-2wgq","CVE-2026-56360"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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