vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass_CVE-2026-47210

{
    "lastseen": "",
    "description": "vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.",
    "published": "2026-06-12T14:17:22.653Z",
    "modified": "2026-06-12T14:17:22.653Z",
    "type": "cve",
    "title": "vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass",
    "source": "GitHub_M",
    "references": "https://github.com/patriksimek/vm2/security/advisories/GHSA-6j2x-vhqr-qr7q\nhttps://github.com/patriksimek/vm2/commit/6915fa4d9bcebd47b9a4f39a1adc1aa94ef6ffc6\nhttps://github.com/patriksimek/vm2/releases/tag/v3.11.4",
    "id": "CVE-2026-47210",
    "bulletinFamily": "",
    "cwe": [
        "CWE-913"
    ],
    "cvelist": null,
    "sourceData": "patriksimek vm2 < 3.11.4",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "vm2",
    "version": "< 3.11.4",
    "vendor": "patriksimek",
    "ai_description": "Sandbox escape vulnerability in vm2 allowing arbitrary code execution in the host process",
    "ai_severity": "Critical",
    "ai_vendor": "patriksimek",
    "ai_product": "vm2",
    "ai_version": "< 3.11.4",
    "ai_score": 9.8
}