What’s Vulnerable › Vulnerabilities

CVE-2026-87794: bestzip 2.2.6 and 3.0.2 Argument Injection via the Native Zip Destination

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-09 · updated 2026-09-18
• Weakness: CWE-88

Description

bestzip versions 2.2.6 and 3.0.2 contain an argument injection vulnerability in the nativeZip function that allows attackers to inject arbitrary arguments to the Info-ZIP backend. Attackers can supply a malicious destination path combined with crafted source entries to execute arbitrary commands with Node.js process privileges. Fixed in 2.2.7 and 3.0.3.

Affected products

• nfriedly bestzip: from 2.2.6 before 2.2.7; from 3.0.2 before 3.0.3 — fixed in 2.2.7, 3.0.3

How to fix

Upgrade to a fixed version: nfriedly bestzip 2.2.7, 3.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/nfriedly/node-bestzip
• https://github.com/nfriedly/node-bestzip/blob/v3.0.2/lib/bestzip.js
• https://github.com/nfriedly/node-bestzip/commit/2adb637b0acb05b8475de7db5af4b86ffcf40aaf
• https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc
• https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-xhwx-rch4-ph2v
• https://www.npmjs.com/package/bestzip
• https://www.vulncheck.com/advisories/bestzip-2.2.6-and-3.0.2-argument-injection-via-the-native-zip-destination

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