Medium severity · published Oct 1, 2026
CVE-2026-103260
n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node
4.0
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 2.39.6; 2.40.0 before 2.40.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103260
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103260
vendor-advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738j
third-party-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-node
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