CVE-2026-85172

n8n before 2.34.1 SSRF via Request Helper URI Validation Bypass

State: Published
Severity: 5.3 Medium
Published: Sep 3, 2026
Updated: Oct 29, 2026
Reserved: Sep 3, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	VulnCheck

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
n8nn8n-io	2.34.0 to before 2.34.1Affected 2.34.1Not affected
n8nn8n-io	before 2.33.4Affected 2.33.4Not affected

References

GitHub Security Advisory (GHSA-jp9j-jr97-w9pj)vendor-advisory
VulnCheck Advisory: n8n before 2.34.1 SSRF via Request Helper URI Validation Bypassthird-party-advisory

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