# MAL-2026-12893: Malicious code in bnpl-blocks-atom-bnpl-skeleton (npm)


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

## What is MAL-2026-12893?

MAL-2026-12893 is a malicious package in bnpl-blocks-atom-bnpl-skeleton, published on 5 Aug 2026. 

### Official description

On require of the package's main entry, _init.js fetches a platform-specific binary from obfuscated Cloudflare Workers hostnames (assembled by joining split substrings, e.g. oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT chunked-base64 fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised filenames (dotnet_diag_<token>.exe on Windows,.cache_<token> on Unix), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe. No source, hash, or signature is verified. A parallel dropper bundle in lib/telemetry.js replicates the same write-chmod-spawn primitive behind an analytics/telemetry cover story, with additional string-splitting obfuscation of sensitive APIs (require("child_"+"process"), fs["chmod"+"Sync"]). Any consumer importing this package executes arbitrary attacker-controlled native code on the host.

## What should I do about MAL-2026-12893?

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-2026-12893 is a malicious package: bnpl-blocks-atom-bnpl-skeleton (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-2026-12893/ (Markdown: https://insights.sbomify.com/MAL-2026-12893/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12893

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12893/
Summaries are generated and may contain mistakes; the official description above is the record.