{
  "cveId": "CVE-2023-36810",
  "url": "https://patchblox.com/security/cve/CVE-2023-36810",
  "summary": "CVE-2023-36810 is fixed in 3 products on 1 platform, first by python-pypdf2 1.26.0-2ubuntu0.1~esm2, released June 30, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "pypdf2: pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files",
  "description": "pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. This issue has been addressed in PR 808 and versions from 1.27.9 include this fix. Users are advised to upgrade. There are no known workarounds for this vulnerability.",
  "published": "2023-06-30T12:15:00Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.0063,
  "epssPercentile": 0.50463,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "pypdf2",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.27.9-1",
      "fix": "DEBIAN-CVE-2023-36810",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-36810",
      "released": "2023-06-30T19:15:09Z"
    },
    {
      "platform": "linux",
      "product": "python-pypdf2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.26.0-2ubuntu0.1~esm2",
      "fix": "python-pypdf2 1.26.0-2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-pypdf2-1.26.0-2ubuntu0.1-esm2",
      "released": "2023-06-30T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-pypdf2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.26.0-3ubuntu1.20.04.2",
      "fix": "python-pypdf2 1.26.0-3ubuntu1.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python-pypdf2-1.26.0-3ubuntu1.20.04.2",
      "released": "2023-06-30T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-pypdf2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.26.0-2ubuntu0.1~esm2",
      "fix": "python3-pypdf2 1.26.0-2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-pypdf2-1.26.0-2ubuntu0.1-esm2",
      "released": "2023-06-30T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-pypdf2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.26.0-3ubuntu1.20.04.2",
      "fix": "python3-pypdf2 1.26.0-3ubuntu1.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-pypdf2-1.26.0-3ubuntu1.20.04.2",
      "released": "2023-06-30T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-pypdf2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.26.0-4ubuntu0.22.04.2",
      "fix": "python3-pypdf2 1.26.0-4ubuntu0.22.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-pypdf2-1.26.0-4ubuntu0.22.04.2",
      "released": "2023-06-30T12:15:00Z"
    }
  ],
  "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"
  }
}