{
  "id": "CVE-2026-96639",
  "url": "https://spydr.io/cve/CVE-2026-96639",
  "published": "2026-10-21T21:20:32.217Z",
  "modified": "2026-10-21T21:20:32.217Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "github.com",
  "epss": null,
  "epss_percentile": null,
  "exploited": false,
  "kev": null,
  "ssvc_exploitation": null,
  "vendors": [
    "python-pillow"
  ],
  "products": [
    "python-pillow Pillow"
  ],
  "cwes": [
    "CWE-125",
    "CWE-787"
  ],
  "description": "Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0.",
  "status": "Received",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://github.com/python-pillow/Pillow/commit/78d97d994579aef81aafe123773d525f40f2522a",
      "tags": []
    },
    {
      "url": "https://github.com/python-pillow/Pillow/pull/10105",
      "tags": []
    },
    {
      "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
      "tags": []
    },
    {
      "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-v9pv-5gc8-w2m6",
      "tags": []
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96639",
  "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."
    }
  ]
}