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Malicious package

nerfstudio-gsPyPI

Malicious code in nerfstudio-gs (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-5333
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall nerfstudio-gs

What this malware does

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

Malicious versions

4 flagged
99.0.099.0.199.0.299.0.3

Indicators of compromise (SHA-256)

523b928ceb73227e96f02eb85783222da17d0e716c9c7012b4cbcafd1e787f58
42534f036c9f6bfba22f4712a4c2bd08fd66656db742bb2ce60daaad0d38fcca

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for nerfstudio-gs (4 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging nerfstudio-gs across your stack and pipelines.

  2. If you installed it — respond

    nerfstudio-gs is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If nerfstudio-gs was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks nerfstudio-gs before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. nerfstudio-gs on PyPI has been identified as a malicious package (versions 99.0.0, 99.0.1, 99.0.2, 99.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-06-nerfstudio-gs

References

Credits

  • Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks nerfstudio-gs-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

nerfstudio-gs (PyPI) malicious package — MAL-2026-5333 | O3 Security