CVE-2026-110636

9.8Critical

Published 14 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

9.8Critical

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-78

Impact

Attackers can run arbitrary OS commands with the privileges of the Python process by supplying malicious file paths. This requires an application endpoint that passes user-controlled filenames or paths into pypdftk functions.

Root cause

Functions build shell command strings directly from user-supplied paths and execute them using subprocess.Popen with shell=True enabled.

Affected systems

pypdftk through 0.5

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

No fixed release is currently published; apply PR #57 or sanitize and validate all pdf_path and out_file inputs against strict whitelists before passing them to pypdftk.

shell

$ pip show pypdftk

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-110636