{"id":"CVE-2026-110636","title":"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","summary":"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 shel…","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","cwe":["CWE-78"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T15:17:16.710","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110636","references":[{"url":"https://github.com/revolunet/pypdftk","label":"disclosure@vulncheck.com"},{"url":"https://github.com/revolunet/pypdftk/blob/1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369/pypdftk.py#L87-L123","label":"disclosure@vulncheck.com"},{"url":"https://github.com/revolunet/pypdftk/issues/56","label":"disclosure@vulncheck.com"},{"url":"https://github.com/revolunet/pypdftk/pull/57","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/pypdftk-through-0.5-os-command-injection-via-pdf-and-output-paths","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"ingestedAt":"2026-10-14T15:36:14.013Z","vendor":"revolunet","product":"pypdftk","affected":["pypdftk <= 0.5"],"epss":0.02691,"epssPercentile":0.85806,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-20T01:21:04.535653Z"},"slug":"CVE-2026-110636","body":"## Overview\n\npypdftk 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.5,"exploitation":12,"ransomware":0},"changes":[{"seq":225298,"id":"CVE-2026-110636","ts":1792461019749,"field":"exploit_available","old":"false","new":"true"}]}