# CVE-2024-23331

## Summary

- **CVE ID:** CVE-2024-23331
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-178, CWE-200, CWE-284
- **Published:** Jan 19, 2024
- **Last Modified:** Mar 13, 2026

## Description

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 (>=2.7.0, < 2.9.17)
- vitejs — vite (>=3.0.0, <3.2.8)
- vitejs — vite (>=4.0.0, < 4.5.2)
- vitejs — vite (>=5.0.0, < 5.0.12)

## References

- [CNA](https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw)
- [CNA](https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5)
- [CNA](https://vitejs.dev/config/server-options.html#server-fs-deny)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.78%
- **EPSS Percentile:** 53.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._