Improper access control in n8n - CVE-2026-42226
Published: April 23, 2026
Vulnerability identifier: #VU127219
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42226
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in dynamic-node-parameters endpoints when handling requests with a supplied credential reference. A remote user can send a specially crafted request with a foreign credential ID and an attacker-controlled destination URL to disclose sensitive information.
The issue affects nodes that resolve credentials dynamically through these endpoints.
Affected software
n8n
How to mitigate CVE-2026-42226
Install security update from vendor's website.
n8n - addressed in versions 1.123.33, 2.17.5, 2.18.0