MAL-2026-16999 Malicious code in bundlsef (RubyGems)
Malicious package
Published
MAL-2026-16999 is a malicious package: bundlsef (RubyGems). 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-2026-16999/ (Markdown: https://insights.sbomify.com/MAL-2026-16999/index.md)
- Package
- bundlsef
- Registry
- RubyGems
What is MAL-2026-16999?
MAL-2026-16999 is a malicious package in bundlsef, published on 22 Sep 2026.
Official description
What should I do about MAL-2026-16999?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.