MAL-2026-12947 Malicious code in bnpl-blocks-feature-partners (npm)
Malicious package
Published
MAL-2026-12947 is a malicious package: bnpl-blocks-feature-partners (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-2026-12947/ (Markdown: https://insights.sbomify.com/MAL-2026-12947/index.md)
- Package
- bnpl-blocks-feature-partners
- Registry
- npm
What is MAL-2026-12947?
MAL-2026-12947 is a malicious package in bnpl-blocks-feature-partners, published on 5 Aug 2026.
Official description
index.js unconditionally require()'s./ext.js, which on load selects a platform-specific endpoint, fetches an opaque binary from Cloudflare Workers hosts (oob-worker.cf10{1,2,3}-*.workers.dev) reassembled from split string literals, with a DNS-TXT chunked base64 fallback via *.dl.wel1.ru subdomains, writes the payload to /var/tmp/.cache<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are reconstructed at runtime from split-string arrays to evade static scanners. No integrity check, no hash/signature verification, filename disguises (.cache_ / dotnet_diag_) mimic system caches, and the fetched code is unrelated to any stated package purpose. The dropper fires on any require() of this package.
What should I do about MAL-2026-12947?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.