CVE-2026-85169

HighCVSS 8.8/10Last modified Oct 29, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-94

Affected software

Vendor	Product	Versions
n8n-io	n8n	< 1.123.73
n8n-io	n8n	>= 2.36.0, < 2.36.2
n8n-io	n8n	>= 2.0.0-rc.0, < 2.35.4

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwcMitigation, Vendor Advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-via-fromai-prototype-leakThird Party Advisory

Timeline

Published: Sep 3, 2026
Last modified: Oct 29, 2026
NVD status: Analyzed

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