XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py_CVE-2026-10099

{
    "lastseen": "",
    "description": "XX-Net V5.16.6 contains a WebSocket frame parsing vulnerability in the WebSocket_receive_worker routine of simple_http_server.py that allows attackers to cause corrupted application data by sending unmasked WebSocket frames. The server unconditionally reads 4 bytes as a masking key regardless of whether the MASK bit is set in the frame header, causing the first 4 bytes of payload to be consumed as a mask key and the remaining payload to be incorrectly XOR-decoded, resulting in data corruption alongside missing RSV bit, opcode, and FIN fragmentation validations.",
    "published": "2026-05-29T15:58:24.062Z",
    "modified": "2026-05-29T15:58:24.062Z",
    "type": "cve",
    "title": "XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py",
    "source": "VulnCheck",
    "references": "https://github.com/XX-net/XX-Net/issues/14169\nhttps://github.com/XX-net/XX-Net/pull/14170\nhttps://github.com/XX-net/XX-Net/commit/a68b972a84ed6e52df9f30237cf47493b9231b53\nhttps://www.vulncheck.com/advisories/xx-net-websocket-frame-parsing-data-corruption-via-simple-http-server-py",
    "id": "CVE-2026-10099",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1286"
    ],
    "cvelist": null,
    "sourceData": "XX-net XX-Net 0\nXX-net XX-Net 0",
    "sourceHref": "",
    "cvss": {
        "score": 4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "XX-Net",
    "version": "0",
    "vendor": "XX-net",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}