# MAL-2026-12694: Malicious code in devplatform-api-v2-endpoint (npm)


- **Type:** Malicious package
- **Package:** `devplatform-api-v2-endpoint` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12694?

MAL-2026-12694 is a malicious package in devplatform-api-v2-endpoint, published on 5 Aug 2026. 

### Official description

On require(), index.js loads./_vendor, whose top-level init() fetches a platform-specific native binary from runtime-assembled Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with a fallback that reassembles a base64-encoded binary from DNS TXT records under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The retrieved bytes are written to /var/tmp or %TEMP% under cover-story names such as.cache_<rand> and dotnet_diag_<rand>.exe, chmod 0755, and detached-spawned via /bin/sh -c or cmd.exe /c start /b. C2 hostnames are constructed by joining split string fragments to evade static scanners, and the package labels the activity as 'analytics'/'telemetry'. The result is arbitrary attacker-controlled code execution on the installer's host on every import of the package.

## What should I do about MAL-2026-12694?

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-2026-12694 is a malicious package: devplatform-api-v2-endpoint (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-2026-12694/ (Markdown: https://insights.sbomify.com/MAL-2026-12694/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12694

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12694/
Summaries are generated and may contain mistakes; the official description above is the record.