# MAL-2026-5333: Malicious code in nerfstudio-gs (PyPI)


- **Type:** Malicious package
- **Package:** `nerfstudio-gs` (PyPI)
- **Published:** 8 Jun 2026

## What is MAL-2026-5333?

MAL-2026-5333 is a malicious package in nerfstudio-gs, published on 8 Jun 2026. 

### Official description

No suspicious behaviors were observed in this package version. No install-time network activity, no credential or environment scraping, no obfuscated payloads, and no lifecycle hooks executing remote content were identified.

During installation or Python setup (via PTH file), the code exfiltrated all kinds of sensitive data, including env variables, browser's data, SSH keys, data from cryptocurrency extensions, shell history files, etc.

---

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-06-nerfstudio-gs

Reasons (based on the campaign):

 - dependency-confusion

 - exfiltration-credentials

 - exfiltration-browser-data

 - exfiltration-crypto

 - exfiltration-env-variables

 - files-exfiltration

 - exfiltration-ssh-keys

 - The package overrides the install command in setup.py to execute malicious code during installation.

 - abuses-pth

## What should I do about MAL-2026-5333?

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-2026-5333 is a malicious package: nerfstudio-gs (PyPI). 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-2026-5333/ (Markdown: https://insights.sbomify.com/MAL-2026-5333/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5333

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5333/
Summaries are generated and may contain mistakes; the official description above is the record.