Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)_CVE-2026-40879

{
    "lastseen": "",
    "description": "Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.",
    "published": "2026-04-21T19:14:17.894Z",
    "modified": "2026-04-21T19:38:04.805Z",
    "type": "cve",
    "title": "Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)",
    "source": "GitHub_M",
    "references": "https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm",
    "id": "CVE-2026-40879",
    "bulletinFamily": "",
    "cwe": [
        "CWE-674"
    ],
    "cvelist": null,
    "sourceData": "nestjs nest < 11.1.19",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "nest",
    "version": "< 11.1.19",
    "vendor": "nestjs",
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    "ai_score": 0
}