Arbitrary Argument Injection Affecting bestzip package, versions <2.2.6>=3.0.0 <3.0.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BESTZIP-19276666
- published27 Aug 2026
- disclosed26 Aug 2026
- creditpoqpwppy
Introduced: 26 Aug 2026
NewCVE-2026-80427 (opens in a new tab)How to fix?
Upgrade bestzip to version 2.2.6, 3.0.2 or higher.
Overview
bestzip is an Uses OS zip command if avaliable (for better performance and speed) or node.js version if there is no system command avaliable. Can be called via node or command line.
Affected versions of this package are vulnerable to Arbitrary Argument Injection through the nativeZip process in lib/bestzip.js. An attacker can execute arbitrary commands on the host by supplying source paths that begin with - so they are passed to the native zip CLI as flags instead of filenames. In deployments where untrusted input reaches bestzip, this lets a malicious source list inject zip options such as -T and -TT, causing the process to run attacker-controlled commands with the privileges of the Node.js application.