| Component | n8n |
| Severity | high (CVSS 7.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N |
| Published (NVD) | 2026-10-01 |
| Affected versions | < 2.39.6 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 2.39.6 |
| Weakness | CWE-522 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.39.6or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-103256
- https://github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf
- https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credentials-leak-via-preauthentication-hook
Read more
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