{
  "cveId": "CVE-2026-84309",
  "url": "https://patchblox.com/security/cve/CVE-2026-84309",
  "summary": "CVE-2026-84309 is fixed in pypdf on 1 platform by DEBIAN-CVE-2026-84309 (version 6.19.0-1), released September 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "pypdf: pypdf is a free and open-source pure-python PDF library",
  "description": "pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.",
  "published": "2026-09-01T20:17:25Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.00187,
  "epssPercentile": 0.08322,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "pypdf",
      "release": "Debian 14",
      "fixedVersion": "6.19.0-1",
      "fix": "DEBIAN-CVE-2026-84309",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84309",
      "released": "2026-09-01T20:17:25Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}