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CVE-2026-53571 is a high severity vulnerability with a CVSS score of 7.5. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
The contents of files that are specified by server.fs.deny can be returned to the browser on Windows.
Only apps that match the following conditions are affected:
--host or server.host config option)server.fs.allowVite’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.
$ 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| Vendor | Product |
|---|---|
| Voidzero | Vite\+ |
| Vitejs | Vite |
| Microsoft | Windows |
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