High severity · published Oct 1, 2026
CVE-2026-103252
n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpoint
7.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 1.123.80; 2.0.0 before 2.39.6; 2.40.0 before 2.40.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103252
vendor-advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-7gvh-q9w3-wqqx
third-party-advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-information-disclosure-via-credential-test-endpoint
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