{
    "id": "CVE-2018-20060",
    "published": "2018-12-11 17:29:00",
    "last_modified": "2026-06-17 01:52:14",
    "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": null,
    "description": "urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.",
    "epss_score": "0.04488",
    "epss_percentile": "0.91218",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-07 18:17:18",
    "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": "python",
            "product": "urllib3"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html",
        "https://access.redhat.com/errata/RHSA-2019:2272",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1649153",
        "https://github.com/urllib3/urllib3/blob/master/CHANGES.rst",
        "https://github.com/urllib3/urllib3/issues/1316",
        "https://github.com/urllib3/urllib3/pull/1346",
        "https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SJERZEJDSUYQP7BNBXMBHRHGY26HRZD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BXLAXHM3Z6DUCXZ7ZXZ2EAYJXWDCZFCT/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWP36YW3KSVLXDBY3QJKDYEPCIMN3VQZ/",
        "https://usn.ubuntu.com/3990-1/",
        "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html",
        "https://access.redhat.com/errata/RHSA-2019:2272",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1649153",
        "https://github.com/urllib3/urllib3/blob/master/CHANGES.rst",
        "https://github.com/urllib3/urllib3/issues/1316",
        "https://github.com/urllib3/urllib3/pull/1346",
        "https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SJERZEJDSUYQP7BNBXMBHRHGY26HRZD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BXLAXHM3Z6DUCXZ7ZXZ2EAYJXWDCZFCT/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWP36YW3KSVLXDBY3QJKDYEPCIMN3VQZ/",
        "https://security.netapp.com/advisory/ntap-20241227-0010/",
        "https://usn.ubuntu.com/3990-1/"
    ]
}