# MAL-2026-12997: Malicious code in bnpl-blocks-mobile-bnpl-navigation (npm)


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

## What is MAL-2026-12997?

MAL-2026-12997 is a malicious package in bnpl-blocks-mobile-bnpl-navigation, published on 5 Aug 2026. 

### Official description

On require of the package's main, index.js unconditionally loads _bootstrap.js, which fetches a platform-specific binary from Cloudflare Workers subdomains whose hostnames are reconstructed at runtime from split string fragments (e.g. 'oob-worker.cf100-416.workers.dev', 'cf103-070.workers.dev', 'cf102-baf.workers.dev'), with a DNS-TXT base64-chunked fallback resolving over sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to a hidden temp path of the form.cache_<rand>/dotnet_diag_<rand>.exe, chmod 0755 on POSIX, and spawned detached via /bin/sh -c on POSIX or cmd on Windows. There is no hash or signature verification, the destination hosts are obfuscated by string-split concatenation, and lib/telemetry.js exhibits the same reconstruct-fetch-write-chmod-spawn pattern with require("child_" + "process"). The package is presented as 'telemetry', but the code path is an unsigned unpinned remote-code loader that executes attacker-controlled bytes on any machine that installs or requires the package.

## What should I do about MAL-2026-12997?

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-2026-12997 is a malicious package: bnpl-blocks-mobile-bnpl-navigation (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-2026-12997/ (Markdown: https://insights.sbomify.com/MAL-2026-12997/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12997

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12997/
Summaries are generated and may contain mistakes; the official description above is the record.