Server-Side Request Forgery (SSRF) in n8n - #VU141002
Published: August 5, 2026
Vulnerability identifier: #VU141002
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information from internal hosts.
The vulnerability exists due to missing domain allowlist enforcement in the /dynamic-node-parameters/options endpoint methodName branch when invoking node loadOptions and listSearch methods using a credential base URL. A remote user can create a credential that points to an internal host and send a crafted request to this endpoint to disclose sensitive information from internal hosts.
The endpoint can be called directly without creating or executing a workflow, and the server returns the fetched response through the autocomplete payload.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 2.33.4, 2.34.1