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Vulnerability record · CVE-2026-106057 · published 7 October 2026

CVE-2026-106057: OS command injection vulnerability

patool before 4.0.6 contains an OS command injection vulnerability on Windows because shell_quote_nt fails to escape cmd.exe metacharacters or embedded double quotes in archive filenames. Attackers can supply crafted filenames like report&calc.gz for single-file formats run with shell=True to execute commands with patool process privileges.

8.5 CVSS 4.0 High CWE-78 · OS command injection Deferred
8.5CVSS 4.0 base score
-EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
7 Oct 2026Last modified by NVD

Description

patool before 4.0.6 contains an OS command injection vulnerability on Windows because shell_quote_nt fails to escape cmd.exe metacharacters or embedded double quotes in archive filenames. Attackers can supply crafted filenames like report&calc.gz for single-file formats run with shell=True to execute commands with patool process privileges.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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:

References

LinkTags
https://github.com/wummel/patool
https://github.com/wummel/patool/blob/4.0.5/patoolib/util.py#L110-L116
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

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Source: NIST National Vulnerability Database (record CVE-2026-106057), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.