CVE-2026-110636CWE-78command-injection

CVE-2026-110636

Critical · published October 14, 2026

CVSS v3.1
9.8
EPSS
2%
Percentile
83.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.02348 · 83.5th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-14T19:17Z
References (6)
https://github.com/revolunet/pypdftk · [email protected]https://github.com/revolunet/pypdftk/blob/1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369/pypdftk.py#L87-L123 · [email protected]https://github.com/revolunet/pypdftk/issues/56 · [email protected]https://github.com/revolunet/pypdftk/pull/57 · [email protected]https://www.vulncheck.com/advisories/pypdftk-through-0.5-os-command-injection-via-pdf-and-output-paths · [email protected]https://github.com/revolunet/pypdftk/issues/56 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 2%
    epss
  • 14 OCT 14:17Z
    pypdftk through 0.5 OS Command Injection via PDF and Output Paths
    cvelistv5
  • 14 OCT 14:17Z
    pypdftk through 0.5 OS Command Injection via PDF and Output Paths
    cvelistv5