@servicetitan/anvil-react@0.11.7
Malicious code in @servicetitan/anvil-react (npm)
Analysis
@servicetitan/anvil-react@0.11.7 is a trojanized React UI library. The preinstall hook (package/setup.mjs) downloads the Bun JavaScript runtime from github[.]com/oven-sh/bun/releases/download/bun-v1.3.13/ and extracts it, then executes a 727KB obfuscated payload (package/math_init.js) through Bun. The payload uses child_process, eval, and Function constructors. The dist/ directory contains a legitimate-looking React component library (Alert, Button, Calendar, etc.) to disguise the malicious behaviour. No repository URL is declared. The package depends on @servicetitan/anvil-icon and @servicetitan/anvil-token, which are also known-malware packages.
- analyzed by
- Leitwacht
- first seen
- Aug 4, 2026, 11:22 AM
- analyzed
- Aug 4, 2026, 11:33 AM
Related advisories
- @servicetitan/anvil-token@0.4.4
- @servicetitan/cp-mfe-dev@1.115.4
- @servicetitan/grid@0.0.66
- @servicetitan/marketing-integration-widgets@1.0.44
- @servicetitan/contentful@0.0.7
- @servicetitan/examples@1.2.9
- @servicetitan/forge@0.5.5
- @servicetitan/micro-frontend@0.0.8
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.