CVE-2026-112947 · GHSA-vfpm-58rq-9qcg
Vite: First 4 bytes of files outside of `server.fs` setting is exposed by `?vite-wasm-instance`
- Risk score
- 50/100
- CVSS
- 6.3 v4.0
- Exploit chance (30 days)
- 0.4%
- Published
- 20 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 hoo…
- Affected
- vite (npm) >= 8.3.0, <= 8.3.2; vite (npm) >= 8.2.0, <= 8.2.3; vite-plus (npm) >= 0.2.8, <= 1.0.0
- Fix
- Upgrade vite to 8.3.3 or 8.2.4; vite-plus to 1.1.0 (whichever matches your release line) or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.3 medium
- On your watchlist: npm
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| vite | npm | >= 8.3.0, <= 8.3.2 | 8.3.3 |
| vite | npm | >= 8.2.0, <= 8.2.3 | 8.2.4 |
| vite-plus | npm | >= 0.2.8, <= 1.0.0 | 1.1.0 |
References
- https://github.com/advisories/GHSA-vfpm-58rq-9qcg
- https://github.com/vitejs/vite/security/advisories/GHSA-vfpm-58rq-9qcg
- https://nvd.nist.gov/vuln/detail/CVE-2026-112947
- https://github.com/vitejs/vite/pull/23655
- https://github.com/vitejs/vite/commit/b6c6d2fb3f853aab4092dc25f0d6816a96c23dff
- https://github.com/vitejs/vite/commit/ba8b7ab43b4afa5d0292ab4b6e3a7b5033cc9c73
- https://github.com/advisories/GHSA-vfpm-58rq-9qcg
Original 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.
Last activity 20 Oct 2026. Patch Forecast updates every hour.