{
    "id": "CVE-2023-4863",
    "published": "2023-09-12 15:15:24",
    "last_modified": "2026-06-17 06:38:46",
    "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-787",
    "description": "Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)",
    "epss_score": "0.99979",
    "epss_percentile": "0.99980",
    "kev": 1,
    "kev_due": "2023-10-04",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:32:36",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2023-10-04."
    },
    "products": [
        {
            "vendor": "bandisoft",
            "product": "honeyview"
        },
        {
            "vendor": "bentley",
            "product": "seequent_leapfrog"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "google",
            "product": "chrome"
        },
        {
            "vendor": "microsoft",
            "product": "edge_chromium"
        },
        {
            "vendor": "microsoft",
            "product": "teams"
        },
        {
            "vendor": "microsoft",
            "product": "webp_image_extension"
        },
        {
            "vendor": "mozilla",
            "product": "firefox"
        },
        {
            "vendor": "mozilla",
            "product": "thunderbird"
        },
        {
            "vendor": "netapp",
            "product": "active_iq_unified_manager"
        },
        {
            "vendor": "webmproject",
            "product": "libwebp"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2023-4863",
        "date_added": "2023-09-13",
        "due_date": "2023-10-04",
        "vendor": "Google",
        "product": "Chromium WebP",
        "name": "Google Chromium WebP Heap-Based Buffer Overflow Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://www.openwall.com/lists/oss-security/2023/09/21/4",
        "http://www.openwall.com/lists/oss-security/2023/09/22/1",
        "http://www.openwall.com/lists/oss-security/2023/09/22/3",
        "http://www.openwall.com/lists/oss-security/2023/09/22/4",
        "http://www.openwall.com/lists/oss-security/2023/09/22/5",
        "http://www.openwall.com/lists/oss-security/2023/09/22/6",
        "http://www.openwall.com/lists/oss-security/2023/09/22/7",
        "http://www.openwall.com/lists/oss-security/2023/09/22/8",
        "http://www.openwall.com/lists/oss-security/2023/09/26/1",
        "http://www.openwall.com/lists/oss-security/2023/09/26/7",
        "http://www.openwall.com/lists/oss-security/2023/09/28/1",
        "http://www.openwall.com/lists/oss-security/2023/09/28/2",
        "http://www.openwall.com/lists/oss-security/2023/09/28/4",
        "https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/",
        "https://blog.isosceles.com/the-webp-0day/",
        "https://bugzilla.suse.com/show_bug.cgi?id=1215231",
        "https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html",
        "https://crbug.com/1479274",
        "https://en.bandisoft.com/honeyview/history/",
        "https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a",
        "https://github.com/webmproject/libwebp/releases/tag/v1.3.2",
        "https://lists.debian.org/debian-lts-announce/2023/09/msg00015.html",
        "https://lists.debian.org/debian-lts-announce/2023/09/msg00016.html",
        "https://lists.debian.org/debian-lts-announce/2023/09/msg00017.html",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/"
    ]
}