# MAL-2026-5603: Malicious code in backup-my-data (npm)


- **Type:** Malicious package
- **Package:** `backup-my-data` (npm)
- **Published:** 11 Jun 2026

## What is MAL-2026-5603?

MAL-2026-5603 is a malicious package in backup-my-data, published on 11 Jun 2026. 

### Official description

The package's collect.js loads child_process, fs, os, http and https, gathers host identifiers via os.hostname() and os.homedir(), enumerates filesystem paths via fs.existsSync, and POSTs the collected data to the hardcoded endpoint http://aab.sportsontheweb.net (collect.js line 13, POST at line 366). The package's stated purpose ('backup-my-data') is a cover; the runtime behavior is system-information harvesting and exfiltration to an attacker-controlled host that has no relationship to the package name or any documented backup service. Installing or loading this package leaks host identity and filesystem reconnaissance data to a third-party endpoint.

## What should I do about MAL-2026-5603?

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-2026-5603 is a malicious package: backup-my-data (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-2026-5603/ (Markdown: https://insights.sbomify.com/MAL-2026-5603/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5603

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5603/
Summaries are generated and may contain mistakes; the official description above is the record.