Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/vitejs/vite/commit/b6c6d2fb3f853aab4092dc25f0d6816a96c23dff
- https://github.com/vitejs/vite/commit/ba8b7ab43b4afa5d0292ab4b6e3a7b5033cc9c73
- https://github.com/vitejs/vite/pull/23655
- https://github.com/vitejs/vite/security/advisories/GHSA-vfpm-58rq-9qcg
FAQ
What is CVE-2026-112947?
CVE-2026-112947 is a documented vulnerability. 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 ?v...
How severe is CVE-2026-112947?
CVSS scoring is not yet available for CVE-2026-112947. Check NVD for updates.
Is there a patch for CVE-2026-112947?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.