vm2: Sandbox escape via unblocked cross-realm Symbol.for keys + missing bridge write-trap symbol checks_CVE-2026-47135

{
    "lastseen": "",
    "description": "vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, Symbol.for override in setup-sandbox.js only intercepts 2 of 9 dangerous Node.js cross-realm symbols. Combined with the bridge's set/defineProperty/deleteProperty traps having no isDangerousCrossRealmSymbol key check, sandbox code can obtain real cross-realm symbols, write them to host objects, and control host-side behavior \u2014 verified with a full util.promisify hijack chain. This issue has been patched in version 3.11.4.",
    "published": "2026-06-12T14:14:42.022Z",
    "modified": "2026-06-12T15:07:56.706Z",
    "type": "cve",
    "title": "vm2: Sandbox escape via unblocked cross-realm Symbol.for keys + missing bridge write-trap symbol checks",
    "source": "GitHub_M",
    "references": "https://github.com/patriksimek/vm2/security/advisories/GHSA-m5q2-4fm3-vfqp\nhttps://github.com/patriksimek/vm2/commit/928aef51898b5c52a05f05a40c4cfeb52e172878\nhttps://github.com/patriksimek/vm2/releases/tag/v3.11.4",
    "id": "CVE-2026-47135",
    "bulletinFamily": "",
    "cwe": [
        "CWE-693"
    ],
    "cvelist": null,
    "sourceData": "patriksimek vm2 < 3.11.4",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
        "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 via unblocked cross-realm Symbol.for keys and missing bridge write-trap symbol checks",
    "ai_severity": "High",
    "ai_vendor": "patriksimek",
    "ai_product": "vm2",
    "ai_version": "< 3.11.4",
    "ai_score": 8.7
}