MAL-2026-12518 Malicious code in break-after (npm)
Malicious package
Published
MAL-2026-12518 is a malicious package: break-after (npm). 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-2026-12518/ (Markdown: https://insights.sbomify.com/MAL-2026-12518/index.md)
- Package
- break-after
- Registry
- npm
What is MAL-2026-12518?
MAL-2026-12518 is a malicious package in break-after, published on 5 Aug 2026.
Official description
The package's preinstall script runs automatically on
npm install and collects os.hostname(), os.userInfo().username, process.cwd(), the configured npm registry, and a set of CI/repository environment variables, then sends the values as query-string parameters in an HTTP GET to the hardcoded bare-IP endpoint http://75.119.137.232:31337/depconfuse. The version number 9999.0.0 combined with the name of an existing public package and preinstall exfiltration of host, user, working-directory, and internal CI repository identifiers is the fingerprint of a dependency-confusion reconnaissance payload: it is designed to be pulled in by an internal build that resolves the higher version from the public registry, and to report back the identity of the victim organization and its private repository names.What should I do about MAL-2026-12518?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.