MAL-2026-14229 Malicious code in carbon-monorepo (npm)
Malicious package
Published
MAL-2026-14229 is a malicious package: carbon-monorepo (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-2026-14229/ (Markdown: https://insights.sbomify.com/MAL-2026-14229/index.md)
- Package
- carbon-monorepo
- Registry
- npm
What is MAL-2026-14229?
MAL-2026-14229 is a malicious package in carbon-monorepo, published on 19 Aug 2026.
Official description
The package's package.json declares a postinstall hook that runs index.js on npm install. index.js collects host reconnaissance and installer secrets — os.hostname(), full process.env, platform/arch, cwd, package.json, node_modules listing, and the output of shell commands whoami/uname/id/cat /etc/passwd/cat /etc/shadow — and reads ~/.npmrc (which typically contains npm auth tokens) and recent ~/.npm/_logs. The collected data is POSTed over plain HTTP via http.request to the hardcoded host ywy8qnd4a931ga4v74k70b9g67c00qof.oastify.com, a Burp Collaborator (OAST) subdomain. Package metadata masquerades as an esbuild netbsd-x64 build (
"description": "netbsd-x64 build for esbuild") but the tarball ships only the recon/exfil script, no build artifacts or library code — the sole install-time effect is running the exfiltration payload.What should I do about MAL-2026-14229?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.