Improper access control in n8n - #VU146803
Published: September 2, 2026
Vulnerability identifier: #VU146803
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass an approval gate and resume a paused execution.
The vulnerability exists due to improper access control in the /chat WebSocket route when resuming a paused execution from a reused resume token. A remote attacker can present a resume token obtained as an anonymous form submitter to bypass an approval gate and resume a paused execution.
Exploitation requires a resume token that was handed to an anonymous form submitter.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 2.37.7, 2.38.2