OpenSSF/OSV advisory MAL-2026-15923 confirms this npm version as malicious. 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...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in line-through (npm)
Details
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.
Decision reason
OpenSSF Malicious Packages via OSV confirms line-through@1.0.0 as malicious (MAL-2026-15923): Malicious code in line-through (npm)