| Component | n8n |
| Severity | medium (CVSS 4) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| Published (NVD) | 2026-10-01 |
| Affected versions | < 2.39.6 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 2.39.6 |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.39.6or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-103260
- https://github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738j
- https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-approval-bypass-via-send-and-wait-node
Read more
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