Vite: Files outside `server.fs.allow` could be served when project paths match system paths on non-Windows machine

Summary

Vite is a frontend tooling framework for JavaScript. Prior to 6.4.4, 7.3.7, 8.1.6, 8.2.4, and 8.3.3, import analysis can record a root-relative browser URL in safeModulePaths instead of the cleaned resolved module identifier. On a network-accessible, non-Windows development server, an imported project file whose URL matches an absolute host path can authorize a later raw-filesystem request for that host file, provided server.fs.deny does not block it. The request can disclose the matching file outside the project root, but it does not allow arbitrary path traversal because the host path must correspond to a project-relative URL authorized by the application graph. This issue is fixed in versions 6.4.4, 7.3.7, 8.1.6, 8.2.4, and 8.3.3.

Timeline

1. Oct 20, 2026, 3:03 PM UTCCVE published
2. Oct 20, 2026, 4:45 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: partial

3. Oct 20, 2026, 4:46 PM UTCRecord last updated
4. Oct 22, 2026, 9:34 PM UTCFirst seen by cve.now

Affected versions

• vitejs vite

  From 8.3.0 · fixed in 8.3.3; From 8.2.0 · fixed in 8.2.4; From 8.0.0 · fixed in 8.1.6; From 7.0.0 · fixed in 7.3.7; fixed in 6.4.4

• vitejs vite-plus

  fixed in 1.1.0

• vitenpm

  From 8.3.0 · fixed in 8.3.3

• vitenpm

  From 8.2.0 · fixed in 8.2.4

• vitenpm

  From 8.0.0 · fixed in 8.1.6

• vitenpm

  From 7.0.0 · fixed in 7.3.7

• vitenpm

  fixed in 6.4.4

• vite-plusnpm

  fixed in 1.1.0

References 7