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CVE-2026-53571— Vite: `server.fs.deny` bypass on Windows alternate paths

Quick assessment

Affected
vitejs vite
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vite是Vite团队开源的一种新型的前端构建工具。 Vite 8.0.16之前版本、7.3.5之前版本和6.4.3之前版本存在安全漏洞，该漏洞源于在Windows上NTFS ADS路径形式未正确规范化以及未拒绝通过8.3短文件名访问文件，可能导致敏感文件内容被返回给浏览器。

AI Predicted 5.3 Difficulty: Easy EPSS 0.58% · P46

Affected Version Matrix 3

VendorProduct Version RangeStatus
vitejs vite >= 8.0.0, < 8.0.16 affected
>= 7.0.0, < 7.3.5 affected
< 6.4.3 affected
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I. Basic Information for CVE-2026-53571

Vulnerability Information
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Vulnerability Title
Vite: `server.fs.deny` bypass on Windows alternate paths
Source: CVE Program / CVE List V5
Vulnerability Description
Vite is a frontend tooling framework for JavaScript. Prior to 8.0.16, 7.3.5, and 6.4.3, the contents of files that are specified by server.fs.deny can be returned to the browser on Windows. 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. This vulnerability is fixed in 8.0.16, 7.3.5, and 6.4.3.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Vite 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vite是Vite团队开源的一种新型的前端构建工具。 Vite 8.0.16之前版本、7.3.5之前版本和6.4.3之前版本存在安全漏洞，该漏洞源于在Windows上NTFS ADS路径形式未正确规范化以及未拒绝通过8.3短文件名访问文件，可能导致敏感文件内容被返回给浏览器。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vitejs vite >= 8.0.0, < 8.0.16 -

II. Public POCs for CVE-2026-53571

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III. Intelligence Information for CVE-2026-53571

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Vendor Advisories for CVE-2026-53571 (1)

IV. Related Vulnerabilities

Same product: vite
Same vendor: vitejs
Same weakness: CWE-22

V. Comments for CVE-2026-53571

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