# MAL-2026-4590: Malicious code in json-to-simple-graphql-schema (npm)


- **Type:** Malicious package
- **Package:** `json-to-simple-graphql-schema` (npm)
- **Published:** 25 May 2026
- **Also known as:** GHSA-2qqv-9mw5-52q2

## What is MAL-2026-4590?

MAL-2026-4590 is a malicious package in json-to-simple-graphql-schema, published on 25 May 2026. 

### Official description

The package contains a poc.js script that collects host reconnaissance data (os.hostname(), os.platform(), output of `whoami` via child_process) and POSTs it to a remote endpoint over https.request. The combination of os/system enumeration, child_process command execution (e.g. `whoami`), and an outbound HTTPS POST in the same file is the canonical host-reconnaissance and exfiltration shape. The package name suggests a JSON-to-GraphQL schema converter, and there is no legitimate reason for such a converter to ship a script that runs `whoami`, reads host identity, and ships the results off-host. Installing or executing this package gives the publisher tangible host reconnaissance data from the installer's machine.

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-2026-4590?

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-2026-4590 is a malicious package: json-to-simple-graphql-schema (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-2026-4590/ (Markdown: https://insights.sbomify.com/MAL-2026-4590/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-4590

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-4590/
Summaries are generated and may contain mistakes; the official description above is the record.