CVE-2026-103256 — n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak via preAuthentication Hook
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted pa…
Published: 2026-10-01 · CVSS: 7.1 · CVSS 4.0
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account passwords at arbitrary hosts, bypassing domain validation controls.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7