Insertion of Sensitive Information Into Sent Data in n8n - CVE-2026-126388
Published: November 9, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU163079
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126388
CWE-ID: CWE-201
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to obtain stored credentials used by n8n workflows.
The vulnerability exists due to credential-using nodes forwarding authentication headers and basic authentication credentials when an authenticated HTTP request follows a redirect to a different origin. An unauthenticated remote attacker can influence a workflow's redirect target through untrusted input or an attacker-controlled endpoint to receive those credentials at an unintended destination.
Affected software
n8n
How to mitigate CVE-2026-126388
Install security update from vendor's website.
n8n - addressed in versions 2.45.5, 2.46.1, 3.0.1