{
    "id": "CVE-2017-9228",
    "published": "2017-05-24 15:29:00",
    "last_modified": "2026-06-17 01:27:43",
    "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-787",
    "description": "An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write occurs in bitset_set_range() during regular expression compilation due to an uninitialized variable from an incorrect state transition. An incorrect state transition in parse_char_class() could create an execution path that leaves a critical local variable uninitialized until it's used as an index, resulting in an out-of-bounds write memory corruption.",
    "epss_score": "0.06261",
    "epss_percentile": "0.93377",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-06 18:17:16",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "oniguruma_project",
            "product": "oniguruma"
        },
        {
            "vendor": "php",
            "product": "php"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://access.redhat.com/errata/RHSA-2018:1296",
        "https://github.com/kkos/oniguruma/commit/3b63d12038c8d8fc278e81c942fa9bec7c704c8b",
        "https://github.com/kkos/oniguruma/issues/60",
        "https://access.redhat.com/errata/RHSA-2018:1296",
        "https://github.com/kkos/oniguruma/commit/3b63d12038c8d8fc278e81c942fa9bec7c704c8b",
        "https://github.com/kkos/oniguruma/issues/60"
    ]
}