Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck
CVE-2026-103260n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node
Medium 4.0
In plain English
A medium-severity missing authorization in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.3%top 79.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
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