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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-112947

Vite: First 4 bytes of files outside of `server.fs` setting is exposed by `?vite-wasm-instance`

Description

Vite is a frontend tooling framework for JavaScript. From 8.2.0 until 8.2.4 and 8.3.3, the first 4 bytes of files outside of server.fs setting can be returned to the browser by a request containing ?vite-wasm-instance. Requests containing the ?vite-wasm-instance query are handled by the internal Wasm plugin's load hook. The hook removes the query and reads the resulting path directly from disk, but the server.fs checks were not applied. After reading the file, Vite attempts to parse it as WebAssembly. When that parse fails, Node and deno throws an error that contains the first 4 bytes of the file. This vulnerability is fixed in 8.2.4 and 8.3.3.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

vitejs vite

  • >= 8.3.0, < 8.3.3affected
  • >= 8.2.0, < 8.2.4affected

vitejs vite-plus

  • >= 0.2.8, < 1.1.0affected

References