CVE-2026-103252

n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpoint

State: Published
Severity: 7.1 High
Published: Oct 1, 2026
Updated: Oct 1, 2026
Reserved: Sep 30, 2026

Description

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain an authorization bypass vulnerability in the credential test endpoint that resolves project-scoped variables without validating caller access. Attackers can specify an arbitrary project ID in the request body to interpolate sensitive variables into credential test requests sent to attacker-controlled hosts for exfiltration.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N	VulnCheck
3.1	7.7 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
n8nn8n-io	before 1.123.80Affected 2.0.0 to before 2.39.6Affected 2.40.0 to before 2.40.1Affected

References

GitHub Security Advisory (GHSA-7gvh-q9w3-wqqx)vendor-advisory
VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpointthird-party-advisory

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