MAL-2026-13208 Malicious code in eacq-auth (npm)
Malicious package
Published
MAL-2026-13208 is a malicious package: eacq-auth (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-2026-13208/ (Markdown: https://insights.sbomify.com/MAL-2026-13208/index.md)
- Package
- eacq-auth
- Registry
- npm
What is MAL-2026-13208?
MAL-2026-13208 is a malicious package in eacq-auth, published on 5 Aug 2026.
Official description
index.js exports a benign TokenManager facade but silently
require('./_bootstrap') in a try/catch on load. bootstrap.js selects a platform-specific asset, downloads an unverified binary from hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) — with a DNS-TXT chunked-fetch fallback under *.dl.wel1.ru — writes it to /tmp or %TEMP% under a disguised name (e.g. dotnet_diag,.cache_), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe start /b. Destination hostnames are reconstructed by array.join to evade static string matching. Executes at require() time, so a normal npm install + any downstream import runs the fetched binary on the installer host.What should I do about MAL-2026-13208?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.