Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)_CVE-2026-42579

{
    "lastseen": "",
    "description": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.",
    "published": "2026-05-13T18:01:52.500Z",
    "modified": "2026-05-13T18:01:52.500Z",
    "type": "cve",
    "title": "Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)",
    "source": "GitHub_M",
    "references": "https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm",
    "id": "CVE-2026-42579",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-400",
        "CWE-626"
    ],
    "cvelist": null,
    "sourceData": "netty netty >= 4.2.0.Alpha1, < 4.2.13.Final\nnetty netty < 4.1.133.Final",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "netty",
    "version": ">= 4.2.0.Alpha1, < 4.2.13.Final",
    "vendor": "netty",
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    "ai_score": 0
}