# MAL-2026-950: Malicious code in web3tool (PyPI)


- **Type:** Malicious package
- **Package:** `web3tool` (PyPI)
- **Published:** 19 Feb 2026

## What is MAL-2026-950?

MAL-2026-950 is a malicious package in web3tool, published on 19 Feb 2026. 

### Official description

The malicious code is in the ethrpc-keys package, which is a clone of legitimate eth-keys, but contains a modification that silently exfiltrates the user's private key. Other packages in the campaign are also clones of legitimate packages, but the only modification is in pulling (directly or traversally) the malicious dependency. At the end, all packages in the campaign exfiltrate the private key.

---

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

Campaign: 2026-02-old-ethrpc-keys

Reasons (based on the campaign):

 - clones-real-package

 - exfiltration-crypto

 - crypto-related

 - action-hidden-in-lib-usage

 - The malicious code is intentionally included in a dependency of the package

## What should I do about MAL-2026-950?

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-2026-950 is a malicious package: web3tool (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-2026-950/ (Markdown: https://insights.sbomify.com/MAL-2026-950/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-950

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-950/
Summaries are generated and may contain mistakes; the official description above is the record.