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 ↗

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

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

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