# MAL-2026-12999: Malicious code in bnpl-blocks-mobile-bnpl-notification (npm)


- **Type:** Malicious package
- **Package:** `bnpl-blocks-mobile-bnpl-notification` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12999?

MAL-2026-12999 is a malicious package in bnpl-blocks-mobile-bnpl-notification, published on 5 Aug 2026. 

### Official description

index.js requires./setup on module load. setup.js assembles Cloudflare Workers hostnames from split string fragments (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT base64 fallback under *.dl.wel1.ru, downloads a platform-specific binary via https.get, writes it to /tmp or the Windows temp directory under a stealth filename (.cache_<hex> or dotnet_diag_<hex>.exe), chmods it 0755, and detach-spawns it via /bin/sh -c or cmd.exe /c start /b. Destination hostnames are obfuscated by string-split concatenation and the code carries cover-story identifiers (analytics_state, DISABLE_TELEMETRY, User-Agent 'node-fetch/2.6'). lib/telemetry.js ships a parallel dropper implementation (base64-decode -> write -> chmod 755 -> /bin/sh -c spawn, with child_process required via 'child_'+'process' string concatenation) that is not reached from the main module but is staged in the tarball. The package's stated purpose is a mobile SDK; the shipped code instead performs unpinned, unverified remote binary execution on the installer's host.

## What should I do about MAL-2026-12999?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-12999 is a malicious package: bnpl-blocks-mobile-bnpl-notification (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-2026-12999/ (Markdown: https://insights.sbomify.com/MAL-2026-12999/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12999

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12999/
Summaries are generated and may contain mistakes; the official description above is the record.