FastGPT: sandbox escape to RCE – code-sandbox regex /\bimport\s*\(/ is bypassable_CVE-2026-44287

{
    "lastseen": "",
    "description": "FastGPT is an AI Agent building platform. Prior to 4.15.0-beta1, the JavaScript sandbox worker at projects/code-sandbox/src/pool/worker.ts:356 blocks dynamic import() with the regex /\\bimport\\s*\\(/.test(code). JavaScript syntax accepts a block comment between import and (; the regex matches only ASCII whitespace, and the bytes /, *, *, / are not in the \\s character class. The payload import/**/(\"child_process\") parses as a syntactically valid dynamic import that the regex does not detect. Because import() is not wrapped by the safeRequire Proxy (which only proxies require), the attacker loads child_process and calls execSync - arbitrary command execution as uid=100(sandbox) inside the sandbox container. This vulnerability is fixed in 4.15.0-beta1.",
    "published": "2026-05-29T19:33:53.500Z",
    "modified": "2026-05-29T19:33:53.500Z",
    "type": "cve",
    "title": "FastGPT: sandbox escape to RCE - code-sandbox regex /\\bimport\\s*\\(/ is bypassable",
    "source": "GitHub_M",
    "references": "https://github.com/labring/FastGPT/security/advisories/GHSA-f5mq-qxm4-5mvc",
    "id": "CVE-2026-44287",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94",
        "CWE-184"
    ],
    "cvelist": null,
    "sourceData": "labring FastGPT < 4.15.0-beta1",
    "sourceHref": "",
    "cvss": {
        "score": 6.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "FastGPT",
    "version": "< 4.15.0-beta1",
    "vendor": "labring",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}