GCVE-110-OSM-2026-3194

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published April 25, 2026

Malicious package detected. Behaviors: data exfiltration, code execution, obfuscated code, install-time execution. Payload: postinstall.js Key findings: - Decoded Base64 Content in postinstall.js - Install Hook Executes Local JS File in package.json: ""postinstall": "node postinstall.js"" - Shell Command Execution in postinstall.js: "require('child_process')" - Dynamic Base64 Decoding in postinstall.js: "atob(DEV_API_KEY)" - Detached Child Process Payload in postinstall.js: "spawn('node', [], { detached: true" IOCs: - urls: http://babeljs.io/, https://david-dm.org/lambda-comos/comos, https://jsonkeeper.com/b/BN77K - domains: jongleberry.com, babeljs.io, david-dm.org, jsonkeeper.com - emails: me@jongleberry.com - payloadFileHash: fd308ff1cb88962c2d77e7cbb3641387d7aca60e596be01ed9cd354a9116de9c Decoded/deobfuscated IOCs: - urls: https://jsonkeeper.com/b/BN77K - domains: jsonkeeper.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	comos-sdk@1.0.0	all (affected)	—

References

Malicious npm package: comos-sdk@1.0.0

advisory

vendor

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