Vite has a `server.fs.deny` bypassed for `inline` and `raw` with `?import` query
### 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](https://vitejs.dev/config/server-options.html#server-host)) 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 ``` $ 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`
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-31125US | high7.5OT critical | KEV | ||
Vite is a frontend tooling framework for javascript. Vite exposes content of non-allowed files using ?inline&import or ?raw?import. Only apps explicitly exposing the Vite dev serve… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/vitejs/vitePACKAGE
- https://github.com/vitejs/vite/commit/59673137c45ac2bcfad1170d954347c1a17ab949WEB
- https://github.com/vitejs/vite/security/advisories/GHSA-4r4m-qw57-chr8WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-31125ADVISORY
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-31125WEB
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