# MAL-2026-12881: Malicious code in bnpl-blocks-atom-bnpl-navigation-arrow (npm)


- **Type:** Malicious package
- **Package:** `bnpl-blocks-atom-bnpl-navigation-arrow` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-7qx6-3gxv-f3mj

## What is MAL-2026-12881?

MAL-2026-12881 is a malicious package in bnpl-blocks-atom-bnpl-navigation-arrow, published on 5 Aug 2026. 

### Official description

Requiring this package executes _platform.js, which detects the host OS/arch, fetches an opaque binary from one of four author-controlled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT base64 fallback resolved via subdomains of wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), writes it to /var/tmp/.cache_<hex> on Unix or TEMP/dotnet_diag_<hex>.exe on Windows disguised as a system artifact, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. All destination hostnames, resolver domains, and even the child_process module name are assembled from split string literals (e.g. ["oob-worke","r.cf103-07","0.worke","rs.de","v"].join(""), require("child_" + "process")) to evade signature-based scanners. A second copy of the dropper is bundled in lib/telemetry.js under an 'analytics SDK' cover story, containing the same base64 buffer construction, fs["chmod" + "Sync"] to 0755, and cp.spawn("/bin/sh", ["-c", filePath + " &"]) primitives.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-12881?

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-2026-12881 is a malicious package: bnpl-blocks-atom-bnpl-navigation-arrow (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-2026-12881/ (Markdown: https://insights.sbomify.com/MAL-2026-12881/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12881

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12881/
Summaries are generated and may contain mistakes; the official description above is the record.