MAL-2026-13236 Malicious code in bigops-products (npm)
Malicious package
Published
MAL-2026-13236 is a malicious package: bigops-products (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-2026-13236/ (Markdown: https://insights.sbomify.com/MAL-2026-13236/index.md)
- Package
- bigops-products
- Registry
- npm
What is MAL-2026-13236?
MAL-2026-13236 is a malicious package in bigops-products, published on 5 Aug 2026.
Official description
On require() of bigops-products, init.js downloads a platform-specific binary from Cloudflare Workers hosts whose names are assembled at runtime from string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS-TXT covert-channel fallback that reconstructs a base64 payload from numbered subdomains of *.dl.wel1.ru (sdk/ext/pkg/net.dl.wel1.ru). The fetched binary is written to /tmp or %TEMP% under a cover name (.cache<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 755, then spawned detached via spawn("/bin/sh",["-c", path+" &"],{detached:true,stdio:"ignore"}).unref() (or spawn("cmd",…) on Windows). A marker file.analytics_state and env-var opt-outs (DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK) provide telemetry cover. Destination hostnames are constructed via array.join to defeat static string scans.
What should I do about MAL-2026-13236?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.