{
    "id": "CVE-2024-4367",
    "published": "2024-05-14 18:15:12",
    "last_modified": "2026-06-17 08:01:45",
    "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-754",
    "description": "A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.",
    "epss_score": "0.70660",
    "epss_percentile": "0.99377",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:34:32",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "mozilla",
            "product": "firefox"
        },
        {
            "vendor": "mozilla",
            "product": "thunderbird"
        },
        {
            "vendor": "open-xchange",
            "product": "open-xchange_appsuite_frontend"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "52273",
            "title": "Firefox ESR 115.11 - PDF.js Arbitrary JavaScript execution",
            "date": "2025-04-22",
            "url": "https://www.exploit-db.com/exploits/52273"
        }
    ],
    "refs_list": [
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1893645",
        "https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html",
        "https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html",
        "https://www.mozilla.org/security/advisories/mfsa2024-21/",
        "https://www.mozilla.org/security/advisories/mfsa2024-22/",
        "https://www.mozilla.org/security/advisories/mfsa2024-23/",
        "http://seclists.org/fulldisclosure/2024/Aug/30",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1893645",
        "https://codeanlabs.com/blog/research/cve-2024-4367-arbitrary-js-execution-in-pdf-js/",
        "https://github.com/gogs/gogs/issues/7928",
        "https://github.com/mozilla/pdf.js/releases/tag/v4.2.67",
        "https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html",
        "https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html",
        "https://www.exploit-db.com/exploits/52273",
        "https://www.mozilla.org/security/advisories/mfsa2024-21/",
        "https://www.mozilla.org/security/advisories/mfsa2024-22/",
        "https://www.mozilla.org/security/advisories/mfsa2024-23/",
        "https://cert-portal.siemens.com/productcert/html/ssa-827383.html"
    ]
}