CVE-2026-106057

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

8.5CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)

CWE

CWE-78

Published

2026-10-07

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

References

• 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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