---
title: "CVE-2026-106057: patool - Command Injection"
description: "patool before 4.0.6 contains a command injection caused by shell_quote_nt failing to escape cmd.exe metacharacters or embedded double quotes in archive filenames on Windows, letting attackers execute arbitrary commands with patool process privileges, exploit requires crafted archive filenames."
url: https://panop.io/threat-heartbeat/CVE-2026-106057/
---

# CVE-2026-106057 patool - Command Injection

patool before 4.0.6 contains a command injection caused by shell\_quote\_nt failing to escape cmd.exe metacharacters or embedded double quotes in archive filenames on Windows, letting attackers execute arbitrary commands with patool process privileges, exploit requires crafted archive filenames.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.76% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-106057)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to version 4.0.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-106057](https://nvd.nist.gov/vuln/detail/CVE-2026-106057)
- [https://github.com/wummel/patool](https://github.com/wummel/patool)
- [https://github.com/wummel/patool/blob/4.0.5/patoolib/util.py#L110-L116](https://github.com/wummel/patool/blob/4.0.5/patoolib/util.py#L110-L116)
- [https://github.com/wummel/patool/commit/592f35761f428afbcde2888ecd3cc4af43881aeb](https://github.com/wummel/patool/commit/592f35761f428afbcde2888ecd3cc4af43881aeb)
- [https://www.vulncheck.com/advisories/patool-before-4.0.6-os-command-injection-on-windows-via-shell-quote-nt](https://www.vulncheck.com/advisories/patool-before-4.0.6-os-command-injection-on-windows-via-shell-quote-nt)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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