{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.5"
              },
              {
                "fixed": "0.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369"
            }
          ],
          "repo": "https://github.com/revolunet/pypdftk",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110636.json"
  },
  "details": "pypdftk through 0.5 contains an OS command injection vulnerability in fill_form(), dump_data_fields(), and pdftk_cmd_util() that builds shell commands from caller-supplied paths. Attackers controlling pdf_path or out_file can inject shell metacharacters interpreted by subprocess.Popen with shell=True to execute OS commands as the Python process.",
  "id": "CVE-2026-110636",
  "modified": "2026-10-16T02:31:07.489411118Z",
  "published": "2026-10-14T14:17:08.465Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://pypi.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110636.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110636"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/pypdftk-through-0.5-os-command-injection-via-pdf-and-output-paths"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/revolunet/pypdftk/issues/56"
    },
    {
      "type": "FIX",
      "url": "https://github.com/revolunet/pypdftk/pull/57"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/revolunet/pypdftk"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/revolunet/pypdftk/blob/1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369/pypdftk.py#L87-L123"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pypdftk through 0.5 OS Command Injection via PDF and Output Paths"
}