{
    "id": "CVE-2019-9816",
    "published": "2019-07-23 14:15:17",
    "last_modified": "2026-06-17 02:44:39",
    "cvss_score": "5.9",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
    "cwe": "CWE-843",
    "description": "A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.",
    "epss_score": "0.06151",
    "epss_percentile": "0.93243",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-30 18:17:23",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "mozilla",
            "product": "firefox"
        },
        {
            "vendor": "mozilla",
            "product": "firefox_esr"
        },
        {
            "vendor": "mozilla",
            "product": "thunderbird"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "46940",
            "title": "Spidermonkey - IonMonkey Unexpected ObjectGroup in ObjectGroupDispatch Operation",
            "date": "2019-05-29",
            "url": "https://www.exploit-db.com/exploits/46940"
        }
    ],
    "refs_list": [
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1536768",
        "https://www.mozilla.org/security/advisories/mfsa2019-13/",
        "https://www.mozilla.org/security/advisories/mfsa2019-14/",
        "https://www.mozilla.org/security/advisories/mfsa2019-15/",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1536768",
        "https://www.mozilla.org/security/advisories/mfsa2019-13/",
        "https://www.mozilla.org/security/advisories/mfsa2019-14/",
        "https://www.mozilla.org/security/advisories/mfsa2019-15/"
    ]
}