MAL-2026-189 Malicious code in oncecall (PyPI)
Malicious package
Published
MAL-2026-189 is a malicious package: oncecall (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-2026-189/ (Markdown: https://insights.sbomify.com/MAL-2026-189/index.md)
- Package
- oncecall
- Registry
- PyPI
What is MAL-2026-189?
MAL-2026-189 is a malicious package in oncecall, published on 10 Jan 2026.
Official description
Package silently downloads and executes an infostealer
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-01-oncecall
Reasons (based on the campaign):
infostealer
Downloads and executes a remote executable.
obfuscation
What should I do about MAL-2026-189?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.