# MAL-2026-13514: Malicious code in eacq-core (npm)


- **Type:** Malicious package
- **Package:** `eacq-core` (npm)
- **Published:** 7 Aug 2026

## What is MAL-2026-13514?

MAL-2026-13514 is a malicious package in eacq-core, published on 7 Aug 2026. 

### Official description

On require() of eacq-core, both _helpers.js and lib/telemetry.js download a platform-specific binary from Cloudflare Workers hosts assembled at runtime via string-splitting (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT fallback to *.dl.wel1.ru, write the bytes to /tmp/.cache_<rand> or %TEMP%\dotnet_diag_<rand>.exe, chmod 0755 (via fs['chmod'+'Sync']), and spawn the file detached through '/bin/sh -c <path> &' or 'cmd /c start'. No hash or signature verification is performed and the destinations are unrelated to any legitimate publisher. child_process is loaded through require('child_'+'process') and hostnames are assembled via.join('') to evade static analysis. Cover-story comments framing the code as an 'Analytics SDK' with 'opt-out env vars' accompany the payload. The fetch-and-execute chain fires unconditionally at module load, giving whoever controls the Workers hosts arbitrary code execution on any machine that installs or imports this package.

## What should I do about MAL-2026-13514?

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-2026-13514 is a malicious package: eacq-core (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-2026-13514/ (Markdown: https://insights.sbomify.com/MAL-2026-13514/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13514

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13514/
Summaries are generated and may contain mistakes; the official description above is the record.