---
title: "CVE-2026-103256: n8n - Information Disclosure"
description: "n8n < 2.39.6 and 2.40.0 < 2.40.1 contain a credentials leak caused by sending unencrypted passwords to unvalidated hosts in Wekan and Baserow username-and-password credentials, letting attackers with credential update permissions leak passwords, exploit requires credential update permissions."
url: https://panop.io/threat-heartbeat/CVE-2026-103256/
---

# CVE-2026-103256 n8n - Information Disclosure

n8n < 2.39.6 and 2.40.0 < 2.40.1 contain a credentials leak caused by sending unencrypted passwords to unvalidated hosts in Wekan and Baserow username-and-password credentials, letting attackers with credential update permissions leak passwords, exploit requires credential update permissions.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103256)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-522](https://cwe.mitre.org/data/definitions/522.html)

## Vendor fix

Upgrade to versions 2.39.6 or 2.40.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103256](https://nvd.nist.gov/vuln/detail/CVE-2026-103256)
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf](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](https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credentials-leak-via-preauthentication-hook)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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