{
  "cveId": "CVE-2025-66034",
  "url": "https://patchblox.com/security/cve/CVE-2025-66034",
  "summary": "CVE-2025-66034 is fixed in 3 products on 1 platform, first by fonttools 4.46.0-1ubuntu0.1~esm1, released November 28, 2025. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "fonttools: fontTools is a library for manipulating fonts, written in Python",
  "description": "fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.",
  "published": "2025-11-28T17:16:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00587,
  "epssPercentile": 0.483,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "4.38.0-1\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2025-66034",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-66034",
      "released": "2025-11-29T01:16:02Z"
    },
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.57.0-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2025-66034",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-66034",
      "released": "2025-11-29T01:16:02Z"
    },
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Debian 14",
      "fixedVersion": "4.61.1-1",
      "fix": "DEBIAN-CVE-2025-66034",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-66034",
      "released": "2025-11-29T01:16:02Z"
    },
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "4.46.0-1ubuntu0.1~esm1",
      "fix": "fonttools 4.46.0-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-fonttools-4.46.0-1ubuntu0.1-esm1",
      "released": "2025-11-28T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "4.55.3-2ubuntu0.25.10.1",
      "fix": "fonttools 4.55.3-2ubuntu0.25.10.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-fonttools-4.55.3-2ubuntu0.25.10.1",
      "released": "2025-11-28T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "fonttools",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "4.57.0-3ubuntu1",
      "fix": "fonttools 4.57.0-3ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-fonttools-4.57.0-3ubuntu1",
      "released": "2025-11-28T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python-FontTools",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "4.47.2-150600.3.3.1",
      "fix": "SUSE-SU-2026:0199-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0199-1",
      "released": "2026-01-21T11:03:55Z"
    },
    {
      "platform": "linux",
      "product": "python-FontTools",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "4.53.1-160000.3.1",
      "fix": "OPENSUSE-SU-2026:20119-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20119-1",
      "released": "2026-01-28T09:58:53Z"
    },
    {
      "platform": "linux",
      "product": "python-FontTools",
      "release": "sles 15.7",
      "fixedVersion": "4.47.2-150600.3.3.1",
      "fix": "SUSE-SU-2026:0199-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0199-1",
      "released": "2026-01-21T11:03:55Z"
    },
    {
      "platform": "linux",
      "product": "python-FontTools",
      "release": "sles 16.0",
      "fixedVersion": "4.53.1-160000.3.1",
      "fix": "SUSE-SU-2026:20184-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-20184-1",
      "released": "2026-01-28T09:56:55Z"
    },
    {
      "platform": "linux",
      "product": "python3-fonttools",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "4.46.0-1ubuntu0.1~esm1",
      "fix": "python3-fonttools 4.46.0-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-fonttools-4.46.0-1ubuntu0.1-esm1",
      "released": "2025-11-28T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-fonttools",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "4.55.3-2ubuntu0.25.10.1",
      "fix": "python3-fonttools 4.55.3-2ubuntu0.25.10.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-python3-fonttools-4.55.3-2ubuntu0.25.10.1",
      "released": "2025-11-28T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-fonttools",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "4.57.0-3ubuntu1",
      "fix": "python3-fonttools 4.57.0-3ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-fonttools-4.57.0-3ubuntu1",
      "released": "2025-11-28T17:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}