Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

CVE-2026-85169n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak

High 8.7

In plain English

A high-severity code injection in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.9%top 40.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.73
n8n-io	n8n	2.36.0 – before 2.36.2
n8n-io	n8n	2.0.0-rc.0 – before 2.35.4

Weakness: CWE-94 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-9x83-43r8-5hwc) vendor-advisory
VulnCheck Advisory: n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak third-party-advisory