CVE-2026-85169

n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler. $fromAI resolved a caller-supplied placeholder name without requiring it to be an own property and admitted reserved keys; against a primitive input value it returned a live host-prototype reference. An attacker with workflow-build privilege can walk the prototype chain to the Function constructor and compile/execute arbitrary code in the main n8n process, leading to remote code execution.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwc	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-via-fromai-prototype-leak	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*

History

18 Sep 2026, 14:47

Type	Values Removed	Values Added
CPE		cpe:2.3:a:n8n:n8n::::::node.js::*
References	~~() https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwc -~~	() https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwc - Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-via-fromai-prototype-leak -~~	() https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-via-fromai-prototype-leak - Third Party Advisory
First Time		N8n n8n N8n
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8

Information

Published : 2026-09-03 13:06

Updated : 2026-10-29 21:17

NVD link : CVE-2026-85169

Mitre link : CVE-2026-85169

CVE.ORG link : CVE-2026-85169

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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