High 7.8Published Oct 7, 2026

CVE-2026-106057patool before 4.0.6 OS Command Injection on Windows via shell_quote_nt

Updated under an hour ago (2026-10-19 08:30 UTC)

Does this affect you?

It affects wummel patool. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.76%, higher than 54% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for wummel patool

Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.76% (percentile 54)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

wummel patool wummel:patool (from the name)	before 4.0.6; 4.0.6 not affected	CNA record

References

https://github.com/wummel/patool/commit/592f35761f428afbcde2888ecd3cc4af43881aebpatch
https://github.com/wummel/patoolproduct
https://github.com/wummel/patool/blob/4.0.5/patoolib/util.py#L110-L116technical-description
https://www.vulncheck.com/advisories/patool-before-4.0.6-os-command-injection-on-windows-via-shell-quote-ntthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.