| Título | Node.js create-react-app 12.0.1 OS Command Injection |
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| Descripción | The react-dev-utils package (v12.0.1) is vulnerable to OS Command Injection on macOS. The openBrowser API fails to properly sanitize URLs before passing them to a shell command via execSync, allowing an attacker to execute arbitrary commands if they can control the URL passed to the function.
The vulnerability exists in openBrowser.js within the startBrowserProcess function. When running on macOS and targeting Google Chrome or a Chromium-based browser, the library uses child_process.execSync to execute an AppleScript:
```
// Located in react-dev-utils/openBrowser.js
execSync(
'osascript openChrome.applescript "' +
encodeURI(url) +
'" "' +
chromiumBrowser +
'"',
{
cwd: __dirname,
stdio: 'ignore',
}
);
```
The code uses encodeURI(url) as a security filter. However, encodeURI does not escape characters that are significant in a shell environment, specifically \$, (, and ). Since the URL is interpolated into a double-quoted string and executed via /bin/sh, the shell expands command substitutions \$(...) or backticks before passing the result to osascript. Although the library was previously patched in v11.0.5 by moving to execFileSync, the dangerous execSync logic has reappeared in version 12.0.1. |
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| Fuente | ⚠️ https://github.com/react/create-react-app/issues/17269 |
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| Usuario | Dremig (UID 95003) |
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| Sumisión | 2026-06-07 08:25 (hace 29 días) |
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| Moderación | 2026-07-05 21:11 (29 days later) |
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| Estado | Aceptado |
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| Entrada de VulDB | 376396 [react create-react-app hasta 5.0.1 en macOS react-dev-utils openBrowser.js startBrowserProcess escalada de privilegios] |
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| Puntos | 20 |
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