MAL-2026-1438 Malicious code in pymnemonic (PyPI)
Malicious package
Published
MAL-2026-1438 is a malicious package: pymnemonic (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-2026-1438/ (Markdown: https://insights.sbomify.com/MAL-2026-1438/index.md)
- Package
- pymnemonic
- Registry
- PyPI
What is MAL-2026-1438?
MAL-2026-1438 is a malicious package in pymnemonic, published on 15 Mar 2026.
Official description
Malicious clone of the legitimate python-utils package, disguised as a crypto-related helper. The malicious code modification exfiltrates sensitive env variables to a hardcoded location.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-03-pymnemonic
Reasons (based on the campaign):
crypto-related
exfiltration-crypto
exfiltration-env-variables
clones-real-package
action-hidden-in-lib-usage
What should I do about MAL-2026-1438?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.