Authorization Bypass in n8n Chat Hub by n8n.io
CVE-2026-118640

5.3MEDIUM

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
28 October 2026

What is CVE-2026-118640?

An authorization bypass vulnerability exists in the Chat Hub of n8n, affecting versions prior to 1.123.85, 2.43.5, and 2.44.1. This flaw allows users with the global:chatUser role to register and execute restricted tool types, leading to potential unauthorized access to sensitive functions such as executing sandboxed code, accessing permitted files, and utilizing instance workflows, Data Tables, and agents. This issue underscores the importance of implementing strict access controls and regular updates to safeguard critical applications.

Affected Version(s)

n8n 0 < 1.123.85

n8n 2.44.0 < 2.44.1

n8n 2.0.0 < 2.43.5

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-43...
vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.85-...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

vonypeto
.