GCVE-110-OSM-2026-9617

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published August 4, 2026

Compromised version 1.0.74 of @umacloud/cli-darwin-arm64, infected via worm propagation in the Shai-Hulud/ChainDrop supply chain attack (Aug 4, 2026). Malicious preinstall scripts (setup.mjs, math_init.js) download the Bun runtime and execute a credential-harvesting payload targeting npm tokens, GitHub tokens, AWS credentials, Kubernetes secrets, Vault tokens, Stripe keys, Slack tokens, SSH keys, and sensitive files. Exfiltrates via Ethereum dead-drop C2. Malicious payload found in: setup.mjs, math_init.js Trigger: preinstall script in package.json Behavior: Downloads Bun runtime, executes obfuscated infostealer payload targeting npm/GitHub/AWS/K8s/Vault/Stripe/Slack credentials and sensitive files. Exfiltrates via Ethereum dead-drop C2. Self-propagating worm. Compromised version: 1.0.74

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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	@umacloud/cli-darwin-arm64	1.0.74 (affected)	—

References

Malicious npm package: @umacloud/cli-darwin-arm64

advisory

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