{
    "id": "CVE-2013-4366",
    "published": "2017-10-30 19:29:00",
    "last_modified": "2026-06-16 23:57:06",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-20",
    "description": "http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null, which allows attackers to have unspecified impact via vectors involving hostname verification.",
    "epss_score": "0.03309",
    "epss_percentile": "0.88238",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-10 18:17:10",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "apache",
            "product": "httpclient"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://svn.apache.org/r1528614",
        "http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt",
        "http://svn.apache.org/r1528614",
        "http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt"
    ]
}