CVE-2026-39363highCWE-1220CWE-200CWE-306

CVE-2026-39363: high-severity vulnerability in vitejs vite

Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket

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36Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 8.2epss 3.4%
Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default "..."). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
vitejs · vitevitejs · vite-plus
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