MSC-2026-6199
Published:July 01, 2026
Updated:July 01, 2026
Coordinated npm malware campaign targeting DeFi/Polymarket developers through fake arbitrage-bot tooling. 30 purpose-built malicious packages across 10 npm accounts (published Jun 20-22, 2026) operate as droppers, side-loaders, direct-embed infostealers, and typosquats of thirdweb/rainbowkit. On install they exfiltrate crypto wallet vaults (MetaMask, Phantom, Solflare, OKX, Coinbase, TrustWallet, Backpack, TronLink), browser credentials and cookies, SSH keys, AWS credentials, .npmrc tokens, Docker configs, shell history, and password-manager databases to attacker C2.
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Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH