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PYSEC-2026-1794

Vulnerability from pysec - Published: 2026-07-07 11:45 - Updated: 2026-07-07 17:25
VLAI
Details

Heap buffer overflow in libwebp allow a remote attacker to perform an out of bounds memory write via a crafted HTML page.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impacted products
Name purl
pillow pkg:pypi/pillow
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pillow",
        "purl": "pkg:pypi/pillow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0",
        "1.1",
        "1.2",
        "1.3",
        "1.4",
        "1.5",
        "1.6",
        "1.7.0",
        "1.7.1",
        "1.7.2",
        "1.7.3",
        "1.7.4",
        "1.7.5",
        "1.7.6",
        "1.7.7",
        "1.7.8",
        "10.0.0",
        "2.0.0",
        "2.1.0",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.3.0",
        "2.3.1",
        "2.3.2",
        "2.4.0",
        "2.5.0",
        "2.5.1",
        "2.5.2",
        "2.5.3",
        "2.6.0",
        "2.6.1",
        "2.6.2",
        "2.7.0",
        "2.8.0",
        "2.8.1",
        "2.8.2",
        "2.9.0",
        "3.0.0",
        "3.1.0",
        "3.1.0.rc1",
        "3.1.0rc1",
        "3.1.1",
        "3.1.2",
        "3.2.0",
        "3.3.0",
        "3.3.1",
        "3.3.2",
        "3.3.3",
        "3.4.0",
        "3.4.1",
        "3.4.2",
        "4.0.0",
        "4.1.0",
        "4.1.1",
        "4.2.0",
        "4.2.1",
        "4.3.0",
        "5.0.0",
        "5.1.0",
        "5.2.0",
        "5.3.0",
        "5.4.0",
        "5.4.0.dev0",
        "5.4.1",
        "6.0.0",
        "6.1.0",
        "6.2.0",
        "6.2.1",
        "6.2.2",
        "7.0.0",
        "7.1.0",
        "7.1.1",
        "7.1.2",
        "7.2.0",
        "8.0.0",
        "8.0.1",
        "8.1.0",
        "8.1.1",
        "8.1.2",
        "8.2.0",
        "8.3.0",
        "8.3.1",
        "8.3.2",
        "8.4.0",
        "9.0.0",
        "9.0.1",
        "9.1.0",
        "9.1.1",
        "9.2.0",
        "9.3.0",
        "9.4.0",
        "9.5.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-4863",
    "GHSA-j7hp-h8jx-5ppr"
  ],
  "details": "Heap buffer overflow in libwebp allow a remote attacker to perform an out of bounds memory write via a crafted HTML page.",
  "id": "PYSEC-2026-1794",
  "modified": "2026-07-07T17:25:03.144219Z",
  "published": "2026-07-07T11:45:24.102852Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4863"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qnighy/libwebp-sys2-rs/pull/21"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-pillow/Pillow/pull/7395"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jaredforth/webp/pull/30"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/39823"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/39825"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/39826"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/39827"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/39828"
    },
    {
      "type": "WEB",
      "url": "https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qnighy/libwebp-sys2-rs/commit/4560c473a76ec8bd8c650f19ddf9d7a44f719f8b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jaredforth/webp/commit/9d4c56e63abecc777df71c702503c3eaabd7dcbc"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202401-10"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202309-05"
    },
    {
      "type": "WEB",
      "url": "https://security-tracker.debian.org/tracker/CVE-2023-4863"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0061.html"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0060.html"
    },
    {
      "type": "WEB",
      "url": "https://pillow.readthedocs.io/en/stable/releasenotes/10.0.1.html#security"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=37478403"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-4863"
    },
    {
      "type": "WEB",
      "url": "https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230929-0011"
    },
    {
      "type": "WEB",
      "url": "https://sethmlarson.dev/security-developer-in-residence-weekly-report-16"
    },
    {
      "type": "WEB",
      "url": "https://stackdiary.com/critical-vulnerability-in-webp-codec-cve-2023-4863"
    },
    {
      "type": "WEB",
      "url": "https://www.bentley.com/advisories/be-2023-0001"
    },
    {
      "type": "WEB",
      "url": "https://www.bleepingcomputer.com/news/google/google-fixes-another-chrome-zero-day-bug-exploited-in-attacks"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5496"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5497"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5498"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2023-40"
    },
    {
      "type": "WEB",
      "url": "https://www.vicarius.io/vsociety/posts/zero-day-webp-vulnerability-cve-2023-4863"
    },
    {
      "type": "WEB",
      "url": "https://blog.isosceles.com/the-webp-0day"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1215231"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/1479274"
    },
    {
      "type": "WEB",
      "url": "https://en.bandisoft.com/honeyview/history"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ImageMagick/ImageMagick/discussions/6664"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dlemstra/Magick.NET/releases/tag/13.3.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/webmproject/libwebp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/webmproject/libwebp/releases/tag/v1.3.2"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00015.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00016.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FYYKLG6CRGEDTNRBSU26EEWAO6D6U645"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OZDGWWMJREPAGKWCJKSCM4WYLANSKIFX"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYZV7TMKF4QHZ54SFJX54BDN52VHGGCX"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHOLML7N2G5KCAZXFWC5IDFFHSQS5SDB"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTRUIS3564P7ZLM2S2IH4Y4KZ327LI4I"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/21/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/7"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/22/8"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/26/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/26/7"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/09/28/4"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/pillow"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-j7hp-h8jx-5ppr"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libwebp: OOB write in BuildHuffmanTable"
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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