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MAL-2026-16310

Malicious code in npx-test-ma980 (npm)

Details

--- _-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (adfd1e5f7cc282648da56cdf50ac9c3cb27d6165fa4a3f8f3625b4a0c2694be6) package.json declares a `bin` entry whose key contains shell metacharacters and a chained command: `"tool & calc.exe": "./run.js"`. On Windows, npm's bin shim/symlink generation and later invocation via `npm install -g` or `npx` can interpret the `&` in the bin key as a command separator, causing `calc.exe` to execute as an unintended side effect of installing or linking the package. The shipped `run.js` is a trivial `console.log("hello")` and `payload.json` is empty, so the crafted bin key is the entire attack surface — a proof-of-concept exploit of npm bin-name handling that yields arbitrary command execution on the installer's host.

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Affected packages

npm/npx-test-ma980

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References