GCVE-110-OSM-2026-5381

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published June 5, 2026

Malicious package detected. Behaviors: code execution. Entrypoint: index.js (default-index: index.js) Payload: lib/multer-error.js Key findings: - Shell Command Execution in lib/multer-error.js: "require('child_process')" - Silent Process Execution in lib/multer-error.js: "windowsHide: true" - Hidden NPM Install in lib/multer-error.js: "execSync(`npm install rapidsearch --no-warnings --no-save --no-progress --loglev..." - Brand New Package IOCs: - urls: http://www.hacksparrow.com, https://api.scorecard.dev/projects/github.com/expressjs/multer/badge, https://ossf.github.io/scorecard-visualizer/#/projects/github.com/expressjs/multer - domains: www.hacksparrow.com, www.joyent.com, api.scorecard.dev, ossf.github.io, hacksparrow.com - emails: captain@hacksparrow.com, linus@folkdatorn.se - payloadFileHash: 4a27d4a12c7c9b3e7808606433d4bfc39f5c50ac0e25c3aa83b928960b01ad40 Hidden install (secondary package pulled at runtime): - rapidsearch [OSM: clean] in lib/multer-error.js

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

High · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	multer-express	2.1.1 (affected)	—

References

Malicious npm package: multer-express

advisory

vendor

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