{
  "id": "CVE-2023-4863",
  "url": "https://spydr.io/cve/CVE-2023-4863",
  "published": "2023-09-12T15:15:24.327Z",
  "modified": "2026-06-17T06:38:46.547Z",
  "score": 8.8,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.99979,
  "epss_percentile": 0.9998,
  "exploited": true,
  "kev": {
    "added": "2023-09-13",
    "due": "2023-10-04",
    "action": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Unknown",
    "name": "Google Chromium WebP Heap-Based Buffer Overflow Vulnerability",
    "notes": "https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html?m=1; https://nvd.nist.gov/vuln/detail/CVE-2023-4863"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Google"
  ],
  "products": [
    "Google Chrome",
    "Google libwebp"
  ],
  "cwes": [
    "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)",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 8.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/21/4",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/1",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/3",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/4",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/5",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/6",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/7",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/8",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/26/1",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/26/7",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/1",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/2",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/4",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://blog.isosceles.com/the-webp-0day/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1215231",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://crbug.com/1479274",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://en.bandisoft.com/honeyview/history/",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/webmproject/libwebp/releases/tag/v1.3.2",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00015.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00016.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00017.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/",
      "tags": [
        "Mailing List"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4863",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}