Update Your Vite Frontend Tooling Framework to Patch File Access Bypass Vulnerability

CVSScvssV3_1: 7.5

Vite, a popular frontend tooling framework for JavaScript applications, has addressed a vulnerability that could allow unauthorized access to sensitive files on case-insensitive file systems like Windows.

The issue stems from a mismatch between how the Vite dev server checks for restricted file paths versus how the underlying file system handles casing. By requesting files using alternative capitalization, attackers could potentially bypass the server’s access controls and obtain restricted files.

This works because while the Vite server doesn’t differentiate casing, the file matching used (picomatch) is case sensitive by default. So requests using augmented casing wouldn’t be blocked as restricted.

If you use Vite on a Windows or other case-insensitive system, it’s important to update to the latest versions that contain the fix. Vite releases 2.9.17, 3.2.8, 4.5.2 and 5.0.12 address this vulnerability.

Updating your Vite framework is the best way to ensure files on your server remain secure and private from would-be hackers exploiting this file access loophole. If an update isn’t possible, consider restricting external access to your development server as an interim measure.