Approval Bypass Vulnerability in n8n by n8n.io
CVE-2026-103260

6.3MEDIUM

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103260?

The Send and Wait node in n8n prior to version 2.39.6 and earlier than 2.40.1 is prone to an approval bypass vulnerability. This flaw allows attackers to escalate their privileges by submitting resume requests without undergoing proper identity verification or possessing necessary approval permissions. As a result, unauthorized users can manipulate waiting executions and trigger sensitive actions within the system. It is crucial for users of affected versions to apply the necessary updates to mitigate this risk.

Affected Version(s)

n8n 0 < 2.39.6

n8n 2.40.0 < 2.40.1

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-34...
vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-2.39.6-an...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

tr4ce-ju
.