# MAL-2026-12958: Malicious code in bnpl-blocks-independent-bnpl-items (npm)


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

## What is MAL-2026-12958?

MAL-2026-12958 is a malicious package in bnpl-blocks-independent-bnpl-items, published on 5 Aug 2026. 

### Official description

On require() of this package, index.js loads _runtime.js which selects a platform-specific asset, fetches an opaque binary from one of three obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) assembled at runtime via string-array.join to evade static matching, writes it to /tmp or %TEMP% under a cover-story name (dotnet_diag_<rand>.exe on Windows,.cache_<rand> on Unix), chmods 0755, and spawns it detached via /bin/sh -c or cmd. A TTL lockfile named.analytics_state masquerades the persistence as telemetry. If HTTPS egress is blocked, _runtime.js falls back to a DNS-TXT covert channel under author-controlled subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), reassembling a base64 payload from numbered TXT records and executing it. No hash or signature verification is performed on the fetched bytes. The README describes only a trivial abstraction class, unrelated to any of the observed network or execution behavior.

## What should I do about MAL-2026-12958?

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-2026-12958 is a malicious package: bnpl-blocks-independent-bnpl-items (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-2026-12958/ (Markdown: https://insights.sbomify.com/MAL-2026-12958/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12958

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12958/
Summaries are generated and may contain mistakes; the official description above is the record.