# MAL-2026-12950: Malicious code in bnpl-blocks-independent-bnpl-breadcrumbs (npm)


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

## What is MAL-2026-12950?

MAL-2026-12950 is a malicious package in bnpl-blocks-independent-bnpl-breadcrumbs, published on 5 Aug 2026. 

### Official description

On require of the package, index.js unconditionally loads setup.js, which downloads an opaque binary from one of four hardcoded *.workers.dev endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback via resolvers under dl.wel1.ru (sdk./ext./pkg./net.). Hostnames and resolver domains are assembled at runtime from split-string fragments to evade static analysis. The downloaded bytes are written to a temporary path under a deceptive name (`.cache_<hex>` on Unix, `dotnet_diag_<hex>.exe` on Windows), chmodded 0755, and detach-spawned via `/bin/sh -c "<path> &"` or `cmd.exe /c start`. Cover-story environment variables (`DISABLE_TELEMETRY`, `ANALYTICS_OPT_OUT`) and cache/diagnostic naming disguise the dropper as telemetry. Reachable on first `require()` of the package; no user opt-in required.

## What should I do about MAL-2026-12950?

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-2026-12950 is a malicious package: bnpl-blocks-independent-bnpl-breadcrumbs (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-2026-12950/ (Markdown: https://insights.sbomify.com/MAL-2026-12950/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12950

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12950/
Summaries are generated and may contain mistakes; the official description above is the record.