{
    "id": "CVE-2019-11707",
    "published": "2019-07-23 14:15:15",
    "last_modified": "2026-06-17 02:13:28",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "cwe": "CWE-843",
    "description": "A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.",
    "epss_score": "0.37696",
    "epss_percentile": "0.98493",
    "kev": 1,
    "kev_due": "2022-06-13",
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:24:30",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-06-13."
    },
    "products": [
        {
            "vendor": "mozilla",
            "product": "firefox"
        },
        {
            "vendor": "mozilla",
            "product": "thunderbird"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2019-11707",
        "date_added": "2022-05-23",
        "due_date": "2022-06-13",
        "vendor": "Mozilla",
        "product": "Firefox and Thunderbird",
        "name": "Mozilla Firefox and Thunderbird Type Confusion Vulnerability",
        "ransomware": 0
    },
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "50691",
            "title": "Mozilla Firefox 67 - Array.pop JIT Type Confusion",
            "date": "2022-02-02",
            "url": "https://www.exploit-db.com/exploits/50691"
        },
        {
            "source": "exploit-db",
            "ref_id": "47038",
            "title": "Mozilla Spidermonkey - IonMonkey 'Array.prototype.pop' Type Confusion",
            "date": "2019-06-26",
            "url": "https://www.exploit-db.com/exploits/47038"
        }
    ],
    "refs_list": [
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1544386",
        "https://security.gentoo.org/glsa/201908-12",
        "https://www.mozilla.org/security/advisories/mfsa2019-18/",
        "https://www.mozilla.org/security/advisories/mfsa2019-20/",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1544386",
        "https://security.gentoo.org/glsa/201908-12",
        "https://www.mozilla.org/security/advisories/mfsa2019-18/",
        "https://www.mozilla.org/security/advisories/mfsa2019-20/",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707"
    ]
}