Description
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance waiting executions and trigger guarded actions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 2.39.6, 2.40.0 – < 2.40.1 | 2.39.6 |
Advisories 1
- WID-SEC-2026-3393 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 1, 2026
References
- GitHub Security Advisory (GHSA-342v-gmh6-738j) vendor-advisory
- VulnCheck Advisory: n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node third-party-advisory