{
    "id": "CVE-2019-11930",
    "published": "2019-12-04 17:16:43",
    "last_modified": "2026-06-17 02:13:51",
    "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-763",
    "description": "An invalid free in mb_detect_order can cause the application to crash or potentially result in remote code execution. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.",
    "epss_score": "0.03248",
    "epss_percentile": "0.87980",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-10 18:17:19",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "facebook",
            "product": "hhvm"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36",
        "https://hhvm.com/blog/2019/10/28/security-update.html",
        "https://www.facebook.com/security/advisories/cve-2019-11930",
        "https://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36",
        "https://hhvm.com/blog/2019/10/28/security-update.html",
        "https://www.facebook.com/security/advisories/cve-2019-11930"
    ]
}