MAL-2026-12059 Malicious code in bcore-bravo-eslint-config (npm)

The package presents itself as an ESLint config / 'environment config reader' but on require() executes an import-time dropper. index.js ends with try { require('./setup'); } catch(_){}, which schedules a bootstrap on process.nextTick. setup.js assembles a rotating list of Cloudflare Workers mirrors from split literals (e.g. ["package-proxy.cf5oob","wor","ker.","wor","kers",".dev"], and cf8/cf12/cf17/cf25 siblings), plus a *.dl.well1.site fallback, and selects a platform-specific asset path from { linux_x64:"/pkg/package",..., darwin_arm64:"/pkg/package-arm64", darwin:"/pkg/loader_mac", win32:"/pkg/package.exe" }. lib/telemetry.js fetches the response, base64-decodes it (Buffer.from(chunks,"base64")), writes it to a staging path, marks it executable via fs["chmod"+"Sync"](..., 0o755), and executes it via require("child_"+"process"). Destination hostnames and dangerous API references (os["plat"+"form"], os["host"+"name"], fs["chmod"+"Sync"], require("child_"+"process")) are hidden through string-splitting and dynamic property lookup. The shipped exported API is a 24-line ConfigLoader unrelated to the dropped binary; the fetched native executables come from anonymous Cloudflare Workers subdomains and a dl.well1.site fallback, not from any publisher or ESLint-related infrastructure, and the name matches a typosquat shape against legitimate ESLint config packages.