netty-incubator-codec-ohttp’s HPKEContext operations may produce empty byte[] on failures_CVE-2026-41207

{
    "lastseen": "",
    "description": "The netty incubator codec.bhttp is a java language binary http parser. Prior to version 0.0.21.Final, HKDF_expand returns non-NULL on failure. The byte[] is filled with zeros and has no way to distinguish success from failure. Since this output is used as HKDF key material for the response AEAD, a  failure silently produces an all-zero key. When EVP_HPKE_CTX_export fails it also returns an empty byte[] array filled with zeros. This byte[] feeds directly into OHttpCrypto.createResponseAEAD(...).  A silent all-zero export secret would produce a deterministic, attacker-predictable AEAD key. Version 0.0.21.Final patches the issue.",
    "published": "2026-06-04T17:22:35.742Z",
    "modified": "2026-06-04T17:22:35.742Z",
    "type": "cve",
    "title": "netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures",
    "source": "GitHub_M",
    "references": "https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-f659-372h-6x3x\nhttps://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680",
    "id": "CVE-2026-41207",
    "bulletinFamily": "",
    "cwe": [
        "CWE-330"
    ],
    "cvelist": null,
    "sourceData": "netty netty-incubator-codec-ohttp < 0.0.21.Final",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "netty-incubator-codec-ohttp",
    "version": "< 0.0.21.Final",
    "vendor": "netty",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}