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.
{
"cwe_ids": [
"CWE-94"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85169.json"
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.123.73"
},
{
"fixed": "2.36.2"
},
{
"fixed": "2.35.4"
}
]
}