MAL-2026-10159 Malicious code in npm-rce-safe-proof-yourname (npm)
Malicious package
Published
MAL-2026-10159 is a malicious package: npm-rce-safe-proof-yourname (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-10159/ (Markdown: https://insights.sbomify.com/MAL-2026-10159/index.md)
- Package
- npm-rce-safe-proof-yourname
- Registry
- npm
What is MAL-2026-10159?
MAL-2026-10159 is a malicious package in npm-rce-safe-proof-yourname, published on 10 Jul 2026.
Official description
On
npm install, postinstall.js runs whoami, reads os.hostname(), process.platform, and process.version, and transmits them via HTTPS GET to a hardcoded remote endpoint at https://testnpm.byte.eyes.sh/npm-proof. This fires automatically as a lifecycle hook with no user consent. The package's declared purpose (npm script for showing date strings) and its self-labeling as a 'safe proof' do not match the observed behavior — the code is a functional install-time identity beacon transmitting the installer's username and hostname to an author-controlled destination. Beaconing installer identity to a hardcoded third-party host on install is credential/identity leakage regardless of the 'proof' framing.What should I do about MAL-2026-10159?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.