CVE-2026-87794: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in nfriedly bestzip
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.
AI Analysis
Technical Summary
CVE-2026-87794 is an argument injection vulnerability in the nativeZip function of nfriedly's bestzip package versions 2.2.6 and 3.0.2. Attackers can supply a malicious destination path combined with crafted source entries to inject arbitrary arguments to the Info-ZIP backend, enabling execution of arbitrary commands with the privileges of the Node.js process running bestzip. This vulnerability is resolved in versions 2.2.7 and 3.0.3.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary commands with the privileges of the Node.js process using bestzip, which can lead to system compromise or unauthorized actions. The CVSS 4.0 score of 8.6 reflects high severity due to the potential for high impact and relatively low attack complexity with no user interaction required.
Mitigation Recommendations
Upgrade bestzip to version 2.2.7 or later, or 3.0.3 or later, where this vulnerability is fixed. No other mitigations are specified. Patch status is confirmed by the fixed versions noted in the description.
CVE-2026-87794: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in nfriedly bestzip
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 v4.0
Score 8.6high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87794 is an argument injection vulnerability in the nativeZip function of nfriedly's bestzip package versions 2.2.6 and 3.0.2. Attackers can supply a malicious destination path combined with crafted source entries to inject arbitrary arguments to the Info-ZIP backend, enabling execution of arbitrary commands with the privileges of the Node.js process running bestzip. This vulnerability is resolved in versions 2.2.7 and 3.0.3.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary commands with the privileges of the Node.js process using bestzip, which can lead to system compromise or unauthorized actions. The CVSS 4.0 score of 8.6 reflects high severity due to the potential for high impact and relatively low attack complexity with no user interaction required.
Mitigation Recommendations
Upgrade bestzip to version 2.2.7 or later, or 3.0.3 or later, where this vulnerability is fixed. No other mitigations are specified. Patch status is confirmed by the fixed versions noted in the description.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-09T09:37:54.271Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa1338aacd9273b4927530f
Added to database: 09/09/2026, 10:23:06 UTC
Last enriched: 09/09/2026, 10:37:17 UTC
Last updated: 09/09/2026, 11:04:57 UTC
Views: 4
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