| Component | n8n |
| Severity | medium (CVSS 6.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| Published (NVD) | 2026-09-03 |
| Last modified | 2026-09-16 |
| Affected versions | n8n < 2.33.4 n8n = 2.34.0 |
| Fixed in | 2.33.4 |
| Weakness | CWE-918 |
| CISA KEV | not listed |
NVD description
n8n versions before 2.34.1 contain a server-side request forgery vulnerability in the legacy request helper function exposed to Code and Function nodes. The validation logic checks the uri property for SSRF safety while the underlying HTTP client uses the url property when both are present, allowing attackers to bypass validation by supplying a safe uri alongside a malicious url to access internal addresses.
What to do
- Upgrade n8n to
2.33.4or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-85172
- https://github.com/n8n-io/n8n/security/advisories/GHSA-jp9j-jr97-w9pj
- https://www.vulncheck.com/advisories/n8n-before-2.34.1-ssrf-via-request-helper-uri-validation-bypass
Read more
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