Vulnerability details
CVE-2026-110636
revolunet pypdftk
pypdftk through 0.5 OS Command Injection via PDF and Output Paths
CVSS 4.0
9.3Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| revolunet | pypdftk | v ≤ 0.5 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://github.com/revolunet/pypdftk/pull/57 issue-trackingpatch
- https://github.com/revolunet/pypdftk/blob/1d3b40c3b42fb3cc6b0192d34aba2c21a1efd369/pypdftk.py#L87-L123 technical-description
- https://github.com/revolunet/pypdftk product
- https://www.vulncheck.com/advisories/pypdftk-through-0.5-os-command-injection-via-pdf-and-output-paths third-party-advisory
- https://github.com/revolunet/pypdftk/issues/56 issue-tracking
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Details
- Published
- 2026-10-14
- Last updated
- 2026-10-20
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 35 · Medium
Exploit prediction (EPSS)
2.69%
Probability of exploitation in 30 days
85.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')