CVE-2026-103260n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | before 2.39.6; from 2.40.0 before 2.40.1 | CNA record |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738jvendor-advisory
- https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-approval-bypass-via-send-and-wait-nodethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.