GCVE-110-OSM-2026-14397

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published November 2, 2026

Malicious package detected. Behaviors: data exfiltration, install-time execution. ENTRY preinstall.js (install-hook: node preinstall.js) - Install Hook Executes Local JS File in package.json DESTINATION - 1 exfil (discord-webhook) (values recorded in verified_iocs) EXFIL - Webhook Data Exfiltration in preinstall.js: "discord.com/api/webhooks/1566232728179843243/pM5rDIrCRrEpQRbA7ibaiQk1XOQlIftmBac..." - System Information Collection in preinstall.js: "os.userInfo()" ADDITIONAL FINDINGS - Publisher Has Other Malicious Packages - Brand New Package - Very New NPM Publisher Account - Rapid Version Publishing PAYLOAD FILES preinstall.js

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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	contracts-upgradeable	all (affected)	—

References

Malicious npm package: contracts-upgradeable

advisory

vendor

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