# MAL-2026-12934: Malicious code in bnpl-blocks-desktop-bnpl-notification (npm)


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

## What is MAL-2026-12934?

MAL-2026-12934 is a malicious package in bnpl-blocks-desktop-bnpl-notification, published on 5 Aug 2026. 

### Official description

On require() of this package, index.js loads _runtime.js which selects an OS/arch-specific payload URL, downloads an opaque binary from one of several Cloudflare Workers hosts whose hostnames are reassembled at runtime from split string fragments (oob-worker.cf100-416.workers.dev, cf99-9b3, cf102-baf, cf101-adf.workers.dev), with a DNS TXT-record fallback channel over sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru that reassembles base64 chunks from numbered subdomains. The downloaded bytes are written to a hidden path under /tmp or %TEMP% disguised as 'analytics_state'/'dotnet_diag', chmod'd 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe. There is no pinning, no signature check, no publisher relationship between the destination hosts and the package's declared purpose (a 'BNPL notification' library). Execution is gated by a stamp file for rate-limiting and by opt-out environment variables.

## What should I do about MAL-2026-12934?

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-2026-12934 is a malicious package: bnpl-blocks-desktop-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-2026-12934/ (Markdown: https://insights.sbomify.com/MAL-2026-12934/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12934

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12934/
Summaries are generated and may contain mistakes; the official description above is the record.