CVE-2026-53571 Vite: `server.fs.deny` bypass on Windows alternate paths

Vite is a frontend tooling framework for JavaScript. Prior to 8.0.16, 7.3.5, and 6.4.3, the contents of files that are specified by server.fs.deny can be returned to the browser on Windows. Vite’s dev server denies direct access to sensitive files through server.fs.deny, including entries such as...

CVE-2026-53571

CVE-2026-53571 affects the Vite dev server. On Windows, the denial mechanism implemented by the option server.fs.deny fails to normalize NTFS ADS path forms before access checks, allowing bypasses such as /.env::$DATA?raw and access via 8.3 short-name tricks. This can enable exposure of sensitive...

Directory Traversal

Overview org.webjars.npm:vite is a Native-ESM powered web dev build tool Affected versions of this package are vulnerable to Directory Traversal through the server.fs.deny configuration due to improper input sanitization. An attacker can bypass server.fs.deny with /. for files under project root...