{"answers":{"affected":"1 open source package ship an affected version, including @openzeppelin-5/contracts.","exploited":"There is no known exploitation of MAL-2026-13738 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-13738 is a malicious package in @openzeppelin-5/contracts, published on 11 Aug 2026."},"fix_prompt":"MAL-2026-13738 is a malicious package: @openzeppelin-5/contracts (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-13738/ (Markdown: https://insights.sbomify.com/MAL-2026-13738/index.md)","id":"MAL-2026-13738","markdown":"https://insights.sbomify.com/MAL-2026-13738/index.md","name":"MAL-2026-13738","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"@openzeppelin-5/contracts is a malicious npm package published by npm account `mssjeep843` that impersonates OpenZeppelin's `@openzeppelin/contracts` (the v5 line) via the look-alike scope `@openzeppelin-5`, falsely describing itself as a \"compatibility distribution\". It ships no Solidity contracts — only an install-time payload (index.js) run via preinstall/postinstall that harvests credential-shaped environment variables and reads and exfiltrates SSH private keys, cloud credentials (AWS/GCP/Kubernetes/Docker), Solana/Anchor/NEAR/Sui wallet keys, Foundry keystores, `.git-credentials` and local `.env` files to `https://webhook.site/326b0891-2093-4800-a4c1-686ce3e07b09`. It is one of a series of DeFi/crypto impersonation packages from the same account sharing this webhook.site endpoint, which also squat Aerodrome Finance, Camelot AMM, Euler EVC, BoringVault and Uniswap Permit2.\n\nPackage name typosquats @openzeppelin/contracts. package.json declares both preinstall and postinstall as `node index.js || true`, so the payload auto-executes on `npm install`. index.js harvests process.env entries matching KEY|TOKEN|SECRET|MNEMONIC|WALLET|AWS|GITHUB|NPM and reads installer-side credential files including ~/.aws/credentials, ~/.ssh/id_rsa, ~/.ssh/id_ed25519, ~/.kube/config, ~/.docker/config.json, ~/.netrc, ~/.npmrc, ~/.git-credentials, gcloud/solana/sui/foundry keystores, and local.env files. The bundle is POSTed to a hardcoded webhook.site endpoint (path 326b0891-2093-4800-a4c1-686ce3e07b09) via a detached child process spawned with a randomized 60–240 second delay to outlive install-time scanning windows. A hostname regex (/^(scan-|detonation|sandbox|ubuntu-fc-uvm)/i) throws early on known sandbox/scanner hosts as anti-analysis gating.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in @openzeppelin-5/contracts (npm)","id":"MAL-2026-13738","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"@openzeppelin-5/contracts","purl":"pkg:npm/%40openzeppelin-5/contracts","source":"MAL-2026-13738"}],"products":null,"published":"2026-08-11","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-13738/"}