Malicious code in jest-test-plugin-utils (npm)
MAL-2026-5896 · GHSA-7969-jc8h-fp32
Published · Modified
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Description
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Source: amazon-inspector (3f948eff13632557a65152c587b6aa87783e49cf40504aedca8ee15da6ed205e)
The package advertises itself as a Jest plugin (name: 'jest-test-plugin-utils', description: 'mqtt utils') but ships no Jest or MQTT functionality. Its main entry dist/index.js is a heavily obfuscated 200KB browserify bundle (obfuscator.io fingerprint: 1299-entry rotated string array, decoder wrapper, control-flow flattening; built with the declared devDependency 'gulp-javascript-obfuscator'). After deobfuscation, the only meaningful behavior is a function loadFilbetScriptSilently() (exposed as window.fetchFilbetScript) that creates a