MAL-2026-126 Malicious code in codefrequencychecker (PyPI)
Malicious package
Published
MAL-2026-126 is a malicious package: codefrequencychecker (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-2026-126/ (Markdown: https://insights.sbomify.com/MAL-2026-126/index.md)
- Package
- codefrequencychecker
- Registry
- PyPI
What is MAL-2026-126?
MAL-2026-126 is a malicious package in codefrequencychecker, published on 7 Jan 2026.
Official description
Package exfiltrates browser cookies and passwords, and starts a Telegram bot allowing re-exfiltrating later.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-01-codefrequencychecker
Reasons (based on the campaign):
exfiltration-browser-data
A Telegram webhook is used to send collected data.
infostealer
What should I do about MAL-2026-126?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.