EUVD-2026-74790
GHSA-pf92-m78r-h85c
Severity by source
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:X/V:X/RE:X/U:X
Local vector because attacker must control Node.js process inputs; PR:N since no OS privileges required, only application-layer access to bestzip parameters.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Argument injection in bestzip's nativeZip function (versions 2.2.6 and 3.0.2) allows attackers who control the destination path or source file entries to inject arbitrary flags into the underlying Info-ZIP binary, achieving command execution at the Node.js process privilege level. Two distinct injection vectors exist: passing a flag-like string such as -n as the destination consumes the -- argument separator, allowing source entries like --unzip-command to be interpreted as zip binary flags that trigger shell execution during archive validation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that an application calls bestzip's nativeZip backend (not the JavaScript fallback) with attacker-controlled values for either the destination path or the source file list. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 with AV:L reflects that exploitation requires local influence over the Node.js process inputs rather than a raw network attack surface. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to bestzip 2.2.7 (for 2.x users) or 3.0.3 (for 3.x users) via `npm update bestzip` or by pinning the version in package.json; these are the vendor-released patched versions documented in https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-xhwx-rch4-ph2v and https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all internal Node.js applications and dependencies that include bestzip 2.2.6 or 3.0.2 using dependency scanning tools (npm audit, Snyk, or equivalent SBOM analysis). …
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