CVE-2024-23331: Vitejs Vite

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Vite is a frontend tooling framework for javascript. The Vite dev server option `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows. This bypass is similar to CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems. Since `picomatch` defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible. By requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. This issue has been addressed in vite@5.0.12, vite@4.5.2, vite@3.2.8, and vite@2.9.17. Users are advised to upgrade. Users unable to upgrade should restrict access to dev servers.

Affected products

• Vitejs Vite: from 2.7.0, before 2.9.17 (fixed in 2.9.17); from 3.0.0, before 3.2.8 (fixed in 3.2.8); from 4.0.0, before 4.5.2 (fixed in 4.5.2); from 5.0.0, before 5.0.12 (fixed in 5.0.12)

Published 2024-01-19. Last modified 2026-06-17.