{
    "id": "CVE-2015-5739",
    "published": "2017-10-18 20:29:00",
    "last_modified": "2026-06-17 00:29:41",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-444",
    "description": "The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers to conduct HTTP request smuggling attacks via a space instead of a hyphen, as demonstrated by \"Content Length\" instead of \"Content-Length.\"",
    "epss_score": "0.09625",
    "epss_percentile": "0.95353",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-05 18:17:13",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "golang",
            "product": "go"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_aus"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_eus"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_tus"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html",
        "http://rhn.redhat.com/errata/RHSA-2016-1538.html",
        "http://seclists.org/oss-sec/2015/q3/237",
        "http://seclists.org/oss-sec/2015/q3/292",
        "http://seclists.org/oss-sec/2015/q3/294",
        "http://www.securityfocus.com/bid/76281",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1250352",
        "https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9",
        "http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html",
        "http://rhn.redhat.com/errata/RHSA-2016-1538.html",
        "http://seclists.org/oss-sec/2015/q3/237",
        "http://seclists.org/oss-sec/2015/q3/292",
        "http://seclists.org/oss-sec/2015/q3/294",
        "http://www.securityfocus.com/bid/76281",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1250352",
        "https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9"
    ]
}