GCVE-110-OSM-2026-3143

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published April 24, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, network activity, obfuscated code, install-time execution. Payload: tests/analyzer.test.ts Key findings: - Base64 Decoded Eval in test_package.json: "eval(atob(" - Decoded Base64 Content in tests/analyzer.test.ts - Decoded Base64 Content in tests/analyzer.test.ts - Curl/Wget Pipe to Shell in bin/npm-sentinel.js: "curl", "wget", "base64", "eval", "| bash" - Curl/Wget Pipe to Shell in dist/heuristics.js: "curl", "wget", "base64", "eval", "| bash" IOCs: - urls: https://via.placeholder.com/800x400?text=npm-sentinel+UI+Demo, http://malicious.com/setup.sh, http://evil.com - domains: via.placeholder.com, malicious.com, evil.com - payloadFileHash: 12156d0139c6a26f134dd4da7d869bc17b5d8bbab88aac35120657430e0c63e5 Decoded/deobfuscated IOCs: - urls: http://evil.com - domains: evil.com

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

9.6/10

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

Affected Products

Vendor	Product	Versions	Platforms
unknown	npm-sentinel	* (affected)	—

References

Malicious npm package: npm-sentinel

advisory

vendor

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