MAL-2026-15923 Malicious code in line-through (npm)
Malicious package
Published
MAL-2026-15923 is a malicious package: line-through (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-2026-15923/ (Markdown: https://insights.sbomify.com/MAL-2026-15923/index.md)
- Package
- line-through
- Registry
- npm
What is MAL-2026-15923?
MAL-2026-15923 is a malicious package in line-through, published on 4 Sep 2026.
Official description
The package's package.json preinstall hook runs vishu.js, which at npm install time collects the installer's public IP (via api.ipify.org), OS hostname, and GitHub Actions / CI environment variables (CI, GITHUB_ACTIONS, GITHUB_WORKFLOW, GITHUB_RUN_ID, and related identifiers), then sends them as query parameters in an HTTPS GET to a hardcoded collector at https://webhook.site/66059630-2030-4b44-b2df-d37e02be0a7d. It also performs a DNS lookup encoding the hostname as a subdomain of an out-of-band collaborator domain (left as the placeholder your-collab-domain.oastify.com). Behavior fires automatically on npm install with no user interaction.
What should I do about MAL-2026-15923?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.