n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-1321"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72769.json"
}{
"cpe": [
"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
"cpe:2.3:a:n8n:n8n:2.32.0:*:*:*:*:node.js:*:*"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.123.67"
},
{
"introduced": "2.0.0"
},
{
"fixed": "2.31.5"
},
{
"introduced": "2.32.0"
},
{
"last_affected": "2.32.0"
}
],
"source": [
"CPE_RANGE",
"CPE_STRING"
]
}