6.3
MediumCVSS 4.0 · from GitHub_M
CVE-2026-112947
Vite: First 4 bytes of files outside of `server.fs` setting is exposed by `?vite-wasm-instance`
vite · Path traversal · CWE-22Affectedvite, vite-plus
FixNo fix listed yet.
PublishedOct 20, 15:10 · GitHub_M
ScoredOct 20 · 6.3 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:09 UTC
What we know
No known exploitation. CISA KEV, checked 22:09 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
It only works under certain conditions, which makes it harder to pull off. CVSS: high attack complexity.
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.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed invite>= 8.3.0, < 8.3.3–vite>= 8.2.0, < 8.2.4–vite-plus>= 0.2.8, < 1.1.0–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known