CVE-2026-103256

High

Description

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.

SeverityHigh

CVSS7.1

Exploit probability—

ProductN8n

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-522CWE-522

How to fix

Update

n8n-io n8n2.39.6, 2.40.1 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	v < 2.39.6, 2.40.0 ≤ v < 2.40.1	2.39.6, 2.40.1

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