What is CVE-2026-106057?

CVE-2026-106057 is a high-severity vulnerability in Wummel Patool, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-10-07.

How severe is CVE-2026-106057?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Wummel Patool

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-10-07 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Wummel Patool

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/wummel/patool/commit/592f35761f428afbcde2888ecd3cc4af43881aeb (patch)
github.com/wummel/patool (product)
github.com/wummel/patool/blob/4.0.5/patoolib/util.py (technical-description)
www.vulncheck.com/advisories/patool-before-4.0.6-os-command-injection-on-window… (third-party-advisory)

Frequently asked questions

What is CVE-2026-106057?: CVE-2026-106057 is a high-severity vulnerability in Wummel Patool, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-10-07.
How severe is CVE-2026-106057?: High severity. CVSS v3 base score is 7.8 out of 10.