CVE-2026-110636
critical · 9.3pypdftk 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.
9.3
CVSS
2.7%
EPSS (exploit prob.)
86th
EPSS percentile
2026-10-14
Published
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-78
References
- https://github.com/revolunet/pypdftk
- https://github.com/revolunet/pypdftk/blob/1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369/pypdftk.py#L87-L123
- https://github.com/revolunet/pypdftk/issues/56
- https://github.com/revolunet/pypdftk/pull/57
- https://www.vulncheck.com/advisories/pypdftk-through-0.5-os-command-injection-via-pdf-and-output-paths
- https://github.com/revolunet/pypdftk/issues/56
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-110636