OpenSSF/OSV advisory MAL-2026-13620 confirms this npm version as malicious. The package's postinstall.js runs automatically on npm install and collects host reconnaissance data — os.hostname(), os.userInfo() username, process.cwd(), and the list of environment variable names from process.env — then POSTs the JSON payload via https.request to a hardcoded webhook.site capture URL (webhook.site/4b333dc6-9783-4f6b-82fa-db9795caa938)...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @catamania/front-components (npm)
Details
The package's postinstall.js runs automatically on npm install and collects host reconnaissance data — os.hostname(), os.userInfo() username, process.cwd(), and the list of environment variable names from process.env — then POSTs the JSON payload via https.request to a hardcoded webhook.site capture URL (webhook.site/4b333dc6-9783-4f6b-82fa-db9795caa938). Environment variable values are masked but key names and host identifiers still leave the installer's machine on every install. The package's index.js contains only a trivial 5-line Vue button component, which does not correspond to the install-time beaconing behavior; the shape is consistent with a scoped dependency-confusion or reconnaissance probe measuring which internal build hosts resolve the @catamania scope to the public registry.
Decision reason
OpenSSF Malicious Packages via OSV confirms @catamania/front-components@1.0.5 as malicious (MAL-2026-13620): Malicious code in @catamania/front-components (npm)