CVE-2026-103256CWE-522

CVE-2026-103256

High · published October 1, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
10.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N
EPSS
0.00211 · 10.8th percentile
Weakness
CWE-522 · Insufficiently Protected Credentials
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf · [email protected]https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credentials-leak-via-preauthentication-hook · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:42Z
    n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak via preAuthentication Hook
    cvelistv5