GHSA-fx2h-pf6j-xcff

Suggest an improvement
Source
https://github.com/advisories/GHSA-fx2h-pf6j-xcff
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-fx2h-pf6j-xcff/GHSA-fx2h-pf6j-xcff.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-fx2h-pf6j-xcff
Aliases
  • CVE-2026-53571
Downstream
Published
2026-06-15T17:17:45Z
Modified
2026-06-15T17:30:09.453314154Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
vite: `server.fs.deny` bypass on Windows alternate paths
Details

Summary

The contents of files that are specified by server.fs.deny can be returned to the browser on Windows.

Impact

Only apps that match the following conditions are affected:

  • explicitly exposes the Vite dev server to the network (using --host or server.host config option)
  • the sensitive file exists in the allowed directories specified by server.fs.allow
  • either of:
    • the sensitive file exists in an NTFS volume
    • the dev server is running on Windows and the sensitive file exists in a volume that 8.3 short name generation is enabled (it is enabled by default on system volumes)

Details

Vite’s dev server denies direct access to sensitive files through server.fs.deny, including entries such as .env, .env.*, and *.{crt,pem}. However, on Windows, the deny logic does not correctly normalize NTFS ADS path forms before access checks are applied. Because of this, requests such as /.env::$DATA?raw are treated as allowed paths, while Windows resolves them to the original file's default data stream.

Similar to that, Windows allows accessing a file using a different name with the 8.3 short name compatibility feature. Vite did not reject accessing files via them.

PoC

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

Access via browser at http://localhost:5173/.env::$DATA?raw <img width="388" height="129" alt="deecc1315123883cfd0f9c26a002845a" src="https://github.com/user-attachments/assets/895c6012-4e2e-4a35-babb-69bbf3ee7170" />

Example expected result: - /.env::$DATA?raw returns the contents of .env - /tls.pem::$DATA?raw returns the contents of tls.pem

Database specific 
{
    "nvd_published_at": null,
    "github_reviewed_at": "2026-06-15T17:17:45Z",
    "github_reviewed": true,
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-200",
        "CWE-22"
    ]
}
References

Affected packages

npm / vite

Package

Name
vite
View open source insights on deps.dev
Purl
pkg:npm/vite

Affected ranges

Type
SEMVER
Events
Introduced
8.0.0
Fixed
8.0.16

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-fx2h-pf6j-xcff/GHSA-fx2h-pf6j-xcff.json"
last_known_affected_version_range 
"<= 8.0.15"

npm / vite

Package

Name
vite
View open source insights on deps.dev
Purl
pkg:npm/vite

Affected ranges

Type
SEMVER
Events
Introduced
7.0.0
Fixed
7.3.5

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-fx2h-pf6j-xcff/GHSA-fx2h-pf6j-xcff.json"
last_known_affected_version_range 
"<= 7.3.4"

npm / vite

Package

Name
vite
View open source insights on deps.dev
Purl
pkg:npm/vite

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.4.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-fx2h-pf6j-xcff/GHSA-fx2h-pf6j-xcff.json"
last_known_affected_version_range 
"<= 6.4.2"

npm / vite-plus

Package

Name
vite-plus
View open source insights on deps.dev
Purl
pkg:npm/vite-plus

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.1.24

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-fx2h-pf6j-xcff/GHSA-fx2h-pf6j-xcff.json"
last_known_affected_version_range 
"<= 0.1.23"