{
    "id": "CVE-2017-0898",
    "published": "2017-09-15 19:29:00",
    "last_modified": "2026-06-17 00:58:29",
    "cvss_score": "9.1",
    "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:N/A:H",
    "cwe": "CWE-134",
    "description": "Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap.",
    "epss_score": "0.09718",
    "epss_percentile": "0.95385",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-05 18:17:15",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.1), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "ruby-lang",
            "product": "ruby"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://www.securityfocus.com/bid/100862",
        "http://www.securitytracker.com/id/1039363",
        "https://access.redhat.com/errata/RHSA-2017:3485",
        "https://access.redhat.com/errata/RHSA-2018:0378",
        "https://access.redhat.com/errata/RHSA-2018:0583",
        "https://access.redhat.com/errata/RHSA-2018:0585",
        "https://github.com/mruby/mruby/issues/3722",
        "https://hackerone.com/reports/212241",
        "https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html",
        "https://security.gentoo.org/glsa/201710-18",
        "https://usn.ubuntu.com/3685-1/",
        "https://www.debian.org/security/2017/dsa-4031",
        "https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/",
        "http://www.securityfocus.com/bid/100862",
        "http://www.securitytracker.com/id/1039363",
        "https://access.redhat.com/errata/RHSA-2017:3485",
        "https://access.redhat.com/errata/RHSA-2018:0378",
        "https://access.redhat.com/errata/RHSA-2018:0583",
        "https://access.redhat.com/errata/RHSA-2018:0585",
        "https://github.com/mruby/mruby/issues/3722",
        "https://hackerone.com/reports/212241",
        "https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html",
        "https://security.gentoo.org/glsa/201710-18",
        "https://usn.ubuntu.com/3685-1/",
        "https://www.debian.org/security/2017/dsa-4031"
    ]
}