# MAL-2026-12692: Malicious code in devplatform-api-endpoint (npm)


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

## What is MAL-2026-12692?

MAL-2026-12692 is a malicious package in devplatform-api-endpoint, published on 5 Aug 2026. 

### Official description

On require() of the package's main entry, index.js unconditionally loads _bootstrap.js, which fetches a platform-specific binary from Cloudflare Workers hosts whose names are constructed by concatenating fragmented string literals (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev). The downloaded bytes are written to a temp path with a masquerading filename (dotnet_diag_*.exe,.cache_*), chmod 0755'd, and spawned detached via child_process (/bin/sh -c or cmd.exe /c start). A DNS-TXT covert-channel fallback resolves TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) enumerated as c.<domain>, 0.<domain>, 1.<domain>,... and base64-decodes the concatenated TXT payloads into an executable that is then written and run. Endpoint literals are fragmented (e.g., ["oob-worker.cf101-","ad","f.workers.d","ev"].join("")) purely to evade static matching. The package advertises no purpose that justifies fetching and executing remote binaries.

## What should I do about MAL-2026-12692?

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-2026-12692 is a malicious package: devplatform-api-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-2026-12692/ (Markdown: https://insights.sbomify.com/MAL-2026-12692/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12692

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12692/
Summaries are generated and may contain mistakes; the official description above is the record.