MAL-2026-12991 Malicious code in bnpl-blocks-mobile-bnpl-header (npm)
Malicious package
Published
MAL-2026-12991 is a malicious package: bnpl-blocks-mobile-bnpl-header (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-2026-12991/ (Markdown: https://insights.sbomify.com/MAL-2026-12991/index.md)
- Package
- bnpl-blocks-mobile-bnpl-header
- Registry
- npm
What is MAL-2026-12991?
MAL-2026-12991 is a malicious package in bnpl-blocks-mobile-bnpl-header, published on 5 Aug 2026.
Official description
On require() of the package, index.js loads bridge.js which fetches an OS-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-over-TXT base64 fallback to *.wel1.ru. The retrieved bytes are written to a hidden path in /var/tmp or %TEMP% under masquerading names (.cache<rand> on Unix, dotnet_diag_<rand>.exe on Windows), chmodded to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Destination hostnames are reconstructed at runtime from split string fragments joined with.join(""), and the drop is gated by DISABLE_TELEMETRY / DO_NOT_TRACK environment checks to present as opt-out telemetry. A freshness marker is written to /tmp/.analytics_state. The package presents itself as a mobile BNPL SDK; none of the fetch-write-execute behavior relates to that stated purpose.
What should I do about MAL-2026-12991?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.