Vulnerability in N8n-Io N8n
CVE-2026-103256
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf (vendor-advisory)
- www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credent… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103256?
- CVE-2026-103256 is a high-severity vulnerability in N8n-Io N8n, classified under Insufficiently Protected Credentials. CVSS score: 7.1/10. Published 2026-10-01.
- How severe is CVE-2026-103256?
- High severity. CVSS v3 base score is 7.1 out of 10.