MAL-2026-14589 Malicious code in yamlformat-tools (PyPI)
Malicious package
Published
MAL-2026-14589 is a malicious package: yamlformat-tools (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-2026-14589/ (Markdown: https://insights.sbomify.com/MAL-2026-14589/index.md)
- Package
- yamlformat-tools
- Registry
- PyPI
What is MAL-2026-14589?
MAL-2026-14589 is a malicious package in yamlformat-tools, published on 28 Aug 2026.
Official description
During import, the package collects sensitive information and exfiltrates it using DNS queries.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-08-ekx-report-utils
Reasons (based on the campaign):
targetted-attack
exfiltration-generic
exfiltration-credentials
What should I do about MAL-2026-14589?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.