MAL-2026-3411 Malicious code in web3-py-checksum (PyPI)
Malicious package
Published
MAL-2026-3411 is a malicious package: web3-py-checksum (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-2026-3411/ (Markdown: https://insights.sbomify.com/MAL-2026-3411/index.md)
- Package
- web3-py-checksum
- Registry
- PyPI
What is MAL-2026-3411?
MAL-2026-3411 is a malicious package in web3-py-checksum, published on 10 May 2026.
Official description
The code silently exfiltrates the private key of a crypto account.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-old-web3-py-checksum
Reasons (based on the campaign):
crypto-related
exfiltration-crypto
What should I do about MAL-2026-3411?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.