GCVE-110-OSM-2026-9661

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published August 4, 2026

Compromised npm package infected via worm propagation in the Shai-Hulud/ChainDrop supply chain attack (Aug 4, 2026). Malicious versions contain obfuscated preinstall scripts (setup.mjs, math_init.js) that 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 encrypted data via Ethereum dead-drop C2. Malicious payload found in: setup.mjs, math_init.js\nTrigger: preinstall script in package.json\nBehavior: 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 infects other maintainers packages.\nCompromised versions: 4.2.1, 4.2.2, 4.2.3, 4.2.4, 4.2.5, 4.2.6, 4.2.7, 4.2.8, 4.2.9, 4.2.10

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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	pob-test-typescript-package-in-monorepo	4.2.1, 4.2.10, 4.2.11, 4.2.12, 4.2.13, 4.2.14, 4.2.15, 4.2.16, 4.2.17, 4.2.2, 4.2.3, 4.2.4, 4.2.5, 4.2.6, 4.2.7, 4.2.8, 4.2.9 (affected)	—

References

Malicious npm package: pob-test-typescript-package-in-monorepo

advisory

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