Which versions of ray-mcp-server are malicious?

The following PyPI versions of ray-mcp-server are flagged malicious: 0.2.1. Treat any of these as compromised.

How do I remediate ray-mcp-server if I installed it?

Remove ray-mcp-server from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is ray-mcp-server part of a known attack campaign?

Yes — ray-mcp-server is associated with the 2026-06-compr-woodpecker campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect ray-mcp-server in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking ray-mcp-server and packages like it before any post-install script runs.

Malicious package

ray-mcp-serverPyPI

Malicious code in ray-mcp-server (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-5325

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall ray-mcp-server

What this malware does

Versions 0.2.1 were compromised.

Compromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.

It seems to be related to the recent Mini Shai Hulud campaign.

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

Campaign: 2026-06-compr-woodpecker

Reasons (based on the campaign):

compromised-package
exfiltration-env-variables
exfiltration-cloud-tokens
exfiltration-credentials
abuses-pth
obfuscation
infostealer
The package contains code to detect if it is running in a sandbox environment.
exfiltration-crypto
files-exfiltration
destructive-actions

Malicious versions

1 flagged

0.2.1

Indicators of compromise (SHA-256)

eae739a0cbe63099850e15e7ed9a72efd9d840d8cf003aa8c8dae1bb4c78a716

0f8f117df787145d0e6e5ae99e9aa507ca623f0b49ebdf056ef3d251c6ddcb28

be9d74f2b6978dc55e35f5e0ac04040bb1322b890195f607b4c6097904f96e5a

Frequently asked questions

No. ray-mcp-server on PyPI has been identified as a malicious package (version 0.2.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-06-compr-woodpecker

References

Credits

Kamil Mańkowski (kam193) · analyst

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection