@ornikar/browserslist-config@8.0.8
Malicious code in @ornikar/browserslist-config (npm)
Analysis
The legitimate @ornikar/browserslist-config npm package was compromised via account takeover. Version 8.0.8 contains a preinstall hook (setup.mjs) that downloads the Bun JavaScript runtime binary from github[.]com/oven-sh/bun/releases and uses it to execute a 727KB heavily obfuscated payload (math_init.js) at install time. The payload is a large obfuscated Bun bundle containing eval, Function constructor, and child_process calls. The package's legitimate purpose is exporting browserlist configuration strings; the preinstall hook and bundled obfuscated binary are entirely unrelated to its declared functionality.
- analyzed by
- Leitwacht
- first seen
- Aug 4, 2026, 11:16 AM
- analyzed
- Aug 4, 2026, 11:23 AM
Related advisories
- @ornikar/prismic-components@0.0.8
- @ornikar/rollup-plugin-postcss@2.0.10
- @ornikar/react-native-svg-transformer@1.0.10
- @ornikar/postcss-config@9.1.7
- @ornikar/lerna-config@11.0.6
- @ornikar/react-modern-calendar-datepicker@3.2.6
- @ornikar/babel-preset-react@6.1.6
- @ornikar/apollo-link-timeout@1.4.3
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.