Arbitrary Argument Injection Affecting bestzip package, versions <2.2.7>=3.0.0 <3.0.3
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-19653586
- published9 Sept 2026
- disclosed9 Sept 2026
- creditiamabighotdog
Introduced: 9 Sep 2026
NewCVE-2026-87794 (opens in a new tab)How to fix?
Upgrade bestzip to version 2.2.7, 3.0.3 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 function in lib/bestzip.js. An attacker can execute arbitrary commands by supplying a crafted options.destination value and source arguments when using the native Info-ZIP zip backend.
The vulnerable command builder passes the destination directly into the zip argv array before the -- separator, so a destination that looks like an option can be interpreted as a flag, allowing later source entries to be parsed as additional options. In applications that forward attacker-controlled archive names and file lists to nativeZip, this can lead to code execution with the Node.js process's privileges.