Origin validation error in n8n - #VU146798
Published: September 2, 2026
Vulnerability identifier: #VU146798
CSH Severity: High
CVSS v4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-346
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper origin validation in Instance AI credential setup when processing fetched content during the credential setup flow. A remote attacker can inject an attacker-controlled URL into the setup flow to disclose sensitive information.
User interaction is required to actively inject the attacker-controlled URL into the setup flow.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 2.37.7, 2.38.2