OpenSSF/OSV advisory MAL-2026-13737 confirms this npm version as malicious. Package name @openzeppelin-4/contracts impersonates the @openzeppelin/contracts scope but ships no Solidity contracts — only index.js, executed via lifecycle scripts. index.js enumerates process.env for credential-shaped keys (KEY, TOKEN, SECRET, AWS, GITHUB, NPM, MNEMONIC, WALLET, INFURA, etc.), reads installer secret files including ~/.aws/credentials, ~/.ssh/id_rsa, ~/.ssh/id_ed25519, ~/.kube/config,...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @openzeppelin-4/contracts (npm)
Details
Package name @openzeppelin-4/contracts impersonates the @openzeppelin/contracts scope but ships no Solidity contracts — only index.js, executed via lifecycle scripts. index.js enumerates process.env for credential-shaped keys (KEY, TOKEN, SECRET, AWS, GITHUB, NPM, MNEMONIC, WALLET, INFURA, etc.), reads installer secret files including ~/.aws/credentials, ~/.ssh/id_rsa, ~/.ssh/id_ed25519, ~/.kube/config, ~/.docker/config.json, ~/.netrc, ~/.npmrc, ~/.gitconfig, ~/.git-credentials, gcloud application default credentials, Solana/Anchor/Sui keys, Foundry keystores, and project.env files, then POSTs the collected data to https://webhook.site/326b0891-2093-4800-a4c1-686ce3e07b09. Delivery uses spawn(process.execPath, ['-e', src], { detached: true, stdio: 'ignore' }) with a randomized 60–240 second delay, and the script bails out when the hostname or username matches sandbox/scanner patterns (scan-, detonation, sandbox, ubuntu-fc-uvm) or when canary env markers are present, evading install-time analysis.
Decision reason
OpenSSF Malicious Packages via OSV confirms @openzeppelin-4/contracts@1.0.1 as malicious (MAL-2026-13737): Malicious code in @openzeppelin-4/contracts (npm)