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Medium

Vite has a `server.fs.deny` bypassed for `inline` and `raw` with `?import` query

  • Disclosed: 31.03.2025
  • Updated: 11.10.2026 10:22

CISA confirms exploitation of this vulnerability in real attacks. Prioritise checking whether your application is affected. CISA KEV · CC0 1.0

Summary

The contents of arbitrary files can be returned to the browser.

Impact

Only apps explicitly exposing the Vite dev server to the network (using --host or server.host config option) are affected.

Details

  • base64 encoded content of non-allowed files is exposed using ?inline&import (originally reported as ?import&?inline=1.wasm?init)
  • content of non-allowed files is exposed using ?raw?import

/@fs/ isn't needed to reproduce the issue for files inside the project root.

PoC

Original report (check details above for simplified cases):

The ?import&?inline=1.wasm?init ending allows attackers to read arbitrary files and returns the file content if it exists. Base64 decoding needs to be performed twice

bash
$ npm create vite@latest
$ cd vite-project/
$ npm install
$ npm run dev

Example full URL http://localhost:5173/@fs/C:/windows/win.ini?import&?inline=1.wasm?init

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package vite >= 6.2.0, < 6.2.4, >= 6.1.0, < 6.1.3, >= 6.0.0, < 6.0.13, >= 5.0.0, < 5.4.16, < 4.5.11 6.2.4, 6.1.3, 6.0.13, 5.4.16, 4.5.11

References

CVSS score 5.3/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-200, CWE-284
Platform
npm
Package
vite
Disclosed
31.03.2025
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-4r4m-qw57-chr8 - CC BY 4.0

Vulnerability history: vite

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (24) in the archive
Total entries
24
First → latest
08.2022 10.2026
Without a fix
0
Exploited in attacks
1

Severity breakdown

  • High 8
  • Medium 14
  • Low 2

Disclosures per year

Severity:
  1. launch-editor: `fs.existsSync()` existence check can be bypassed on Windows
    High CVE-2026-112942 >= 8.3.0, < 8.3.3, >= 8.2.0, < 8.2.4, >= 8.0.0, < 8.1.6, >= 7.0.0, < 7.3.7, < 6.4.4 8.3.3, 8.2.4, 8.1.6, 7.3.7, 6.4.4
  2. vite: `server.fs.deny` bypass on Windows alternate paths
    High · 7.5 CVE-2026-53571 >= 8.0.0, < 8.0.16, >= 7.0.0, < 7.3.5, < 6.4.3 8.0.16, 7.3.5, 6.4.3
  3. launch-editor vulnerable to command injection via the crafted request on Windows
    High CVE-2024-52011 < 5.4.9 5.4.9
  4. Vite: `server.fs.deny` bypassed with queries
    High CVE-2026-39364 >= 8.0.0, < 8.0.5, >= 7.1.0, < 7.3.2 8.0.5, 7.3.2
  5. Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket
    High CVE-2026-39363 >= 8.0.0, < 8.0.5, >= 7.0.0, < 7.3.2, >= 6.0.0, < 6.4.2 8.0.5, 7.3.2, 6.4.2
  6. Vite has a `server.fs.deny` bypassed for `inline` and `raw` with `?import` query this entry
    Medium · 5.3 Exploited in attacks CVE-2025-31125 >= 6.2.0, < 6.2.4, >= 6.1.0, < 6.1.3, >= 6.0.0, < 6.0.13, >= 5.0.0, < 5.4.16, < 4.5.11 6.2.4, 6.1.3, 6.0.13, 5.4.16, 4.5.11
  7. Vite dev server option `server.fs.deny` can be bypassed when hosted on case-insensitive filesystem
    High · 7.5 CVE-2024-23331 >= 2.7.0, < 2.9.17, >= 3.0.0, < 3.2.8, >= 4.0.0, < 4.5.2, >= 5.0.0, < 5.0.12 2.9.17, 3.2.8, 4.5.2, 5.0.12
  8. Vite Server Options (server.fs.deny) can be bypassed using double forward-slash (//)
    High · 7.5 CVE-2023-34092 < 2.9.16, >= 3.0.2, < 3.2.7, >= 4.0.0, < 4.0.5, >= 4.1.0, < 4.1.5, >= 4.2.0, < 4.2.3, >= 4.3.0, < 4.3.9 2.9.16, 3.2.7, 4.0.5, 4.1.5, 4.2.3, 4.3.9
  9. Vite before v2.9.13 vulnerable to directory traversal via crafted URL to victim's service
    High · 8.6 CVE-2022-35204 < 2.9.13, >= 3.0.0-alpha.0, < 3.0.0-beta.4 2.9.13, 3.0.0-beta.4

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