MAL-2026-2299 Malicious code in mnemoniclib (PyPI)
Malicious package
Published
MAL-2026-2299 is a malicious package: mnemoniclib (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-2026-2299/ (Markdown: https://insights.sbomify.com/MAL-2026-2299/index.md)
- Package
- mnemoniclib
- Registry
- PyPI
What is MAL-2026-2299?
MAL-2026-2299 is a malicious package in mnemoniclib, published on 30 Mar 2026.
Official description
Clone of a legitimate library with added malicious code that runs during generating a new mnemonic. The malicious code collects data related to cryptocurrency wallets and selected other files, and exfiltrate them to a hardcoded location.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-03-mnemoniclib
Reasons (based on the campaign):
clones-real-package
action-hidden-in-lib-usage
crypto-related
exfiltration-crypto
files-exfiltration
What should I do about MAL-2026-2299?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.