---
id: CVE-2026-112946
aliases:
  - GHSA-rq7h-c2jc-7f22
title: >-
  Vite: Files outside `server.fs.allow` could be served when project paths match
  system paths on non-Windows machine
summary: >-
  Vite: Files outside `server.fs.allow` could be served when project paths match
  system paths on non-Windows machine
severity: medium
cvss: 6.3
cwe:
  - CWE-22
  - CWE-284
vendor: vite
product: vite
ecosystem: npm
affected:
  - 'vite >= 8.3.0, <= 8.3.2'
  - 'vite >= 8.2.0, <= 8.2.3'
  - 'vite >= 8.0.0, <= 8.1.5'
  - 'vite >= 7.0.0, <= 7.3.6'
  - vite <= 6.4.3
  - vite-plus <= 1.0.0
patched:
  - vite 8.3.3
  - vite 8.2.4
  - vite 8.1.6
  - vite 7.3.7
  - vite 6.4.4
  - vite-plus 1.1.0
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T16:47:43Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-rq7h-c2jc-7f22'
references:
  - url: 'https://github.com/vitejs/vite/security/advisories/GHSA-rq7h-c2jc-7f22'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-112946'
  - url: 'https://github.com/vitejs/vite/pull/23656'
  - url: >-
      https://github.com/vitejs/vite/commit/170b92791421bcd484f7325936d989a82d6bd4aa
  - url: >-
      https://github.com/vitejs/vite/commit/45c0e3392a298626955a0ab93a8e51232daac721
  - url: >-
      https://github.com/vitejs/vite/commit/c3e06f92e969952466b4e2f5801e85e1e00cd905
  - url: >-
      https://github.com/vitejs/vite/commit/e570d8d016096b5f8f6f09808376ca6cf73f27d0
  - url: >-
      https://github.com/vitejs/vite/commit/f0d76c7da13d5e794807b82f0b86c1931a8438e3
  - url: 'https://github.com/advisories/GHSA-rq7h-c2jc-7f22'
tags:
  - ghsa
  - npm
  - cve.org
  - exploit-available
epss: 0.00852
epssPercentile: 0.58372
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T16:45:38.089794Z'
cvssSource: cna
ingestedAt: '2026-10-20T16:10:53.334Z'
---

## Overview

### Summary

The content of files outside `server.fs` setting can be returned to the browser if the project imports a file path concatenated with the `root`. For example, if the project references `<path-to-project-root>/etc/hosts`, the content of `/etc/hosts` was possible to be returned.

The content of files outside the `server.fs.allow` option can be returned to the browser when a project imports a file whose root-relative path matches an absolute path on the host. For example, referencing `<project-root>/etc/hosts` could make Vite return the host's `/etc/hosts` file.

### Impact

Only apps that meet all of the following conditions are affected:

- explicitly expose the Vite dev server to the network (using `--host` or the [`server.host` option](https://vite.dev/config/server-options#server-host))
- contain an imported file whose root-relative browser URL is also the absolute path of a readable file on the host
- The sensitive file is not matched by [`server.fs.deny`](https://vite.dev/config/server-options#server-fs-deny)
- the dev server is not running on Windows

### Details

When Vite analyzes an in-root import, it rewrites the resolved module ID to a browser URL such as `/etc/hostname`. In affected versions, Vite converts that URL with `fsPathFromUrl` and adds the result to `safeModulePaths`. Because `fsPathFromUrl` ensures a leading slash without resolving the URL against the project root, the project URL `/etc/hostname` is recorded as if it were the absolute filesystem path `/etc/hostname`.

For a later request to `/@fs/etc/hostname`, the raw-filesystem middleware interprets `/etc/hostname` as an absolute path. The access check applies `server.fs.deny`, then accepts paths present in `safeModulePaths` before checking `server.fs.allow`. As a result, the request can return the host file instead of the project file that originally populated `safeModulePaths`.

### PoC
The following example requires Linux with a readable `/etc/hostname`:
```bash
$ mkdir vite-safe-module-path-poc
$ cd vite-safe-module-path-poc
$ npm init -y
$ npm install vite@8.3.1
$ mkdir -p etc
$ echo 'PROJECT-DECOY\n' > etc/hostname
$ echo 'import "./etc/hostname"\n' > main.js
$ npx vite --host 127.0.0.1
```

In another terminal:
```bash
$ curl -o /dev/null -s -w '%{http_code}\n' http://127.0.0.1:5173/main.js
200
$ curl -sS -o response -w '%{http_code}\n' http://127.0.0.1:5173/@fs/etc/hostname
200
$ cmp -s response /etc/hostname && echo 'response matches host file'
response matches host file
```

## Affected packages

- `vite >= 8.3.0, <= 8.3.2`
- `vite >= 8.2.0, <= 8.2.3`
- `vite >= 8.0.0, <= 8.1.5`
- `vite >= 7.0.0, <= 7.3.6`
- `vite <= 6.4.3`
- `vite-plus <= 1.0.0`

## Remediation

Upgrade to a patched release:

- `vite 8.3.3`
- `vite 8.2.4`
- `vite 8.1.6`
- `vite 7.3.7`
- `vite 6.4.4`
- `vite-plus 1.1.0`