MediumGHSA-859w-5945-r5v3CVE-2025-46565

Vite's server.fs.deny bypassed with /. for files under project root

Published 30 Apr 2025 · Updated 10 Sept 2026

Affected packages

vitenpm

Affected: >=6.3.0 <6.3.4
Fixed in: 6.3.4

Update to the fixed version for your release line, for example:npm install vite@6.3.4

vitenpm

Affected: >=6.2.0 <6.2.7
Fixed in: 6.2.7

Update to the fixed version for your release line, for example:npm install vite@6.2.7

vitenpm

Affected: >=6.0.0 <6.1.6
Fixed in: 6.1.6

Update to the fixed version for your release line, for example:npm install vite@6.1.6

vitenpm

Affected: >=5.0.0 <5.4.19
Fixed in: 5.4.19

Update to the fixed version for your release line, for example:npm install vite@5.4.19

vitenpm

Affected: <4.5.14
Fixed in: 4.5.14

Update to the fixed version for your release line, for example:npm install vite@4.5.14

Details

Summary

The contents of files in the project `root` that are denied by a file matching pattern 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) are affected. Only files that are under project `root` and are denied by a file matching pattern can be bypassed.

Examples of file matching patterns: .env, .env.*, *.{crt,pem}, **/.env
Examples of other patterns: **/.git/**, .git/**, .git/**/*

Details

`server.fs.deny` can contain patterns matching against files (by default it includes .env, .env.*, *.{crt,pem} as such patterns). These patterns were able to bypass for files under root by using a combination of slash and dot (/.).

PoC

npm create vite@latest
cd vite-project/
cat "secret" > .env
npm install
npm run dev
curl --request-target /.env/. http://localhost:5173

!image !image

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.