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Vulnerability record · CVE-2026-87794 · published 9 September 2026

CVE-2026-87794: Argument injection vulnerability

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.

8.6 CVSS 4.0 High EPSS 0.28% · top 81.6% CWE-88 · Argument injection Deferred
8.6CVSS 4.0 base score
0.28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
18 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-87794), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.