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CVE-2026-39363

CVE-2026-39363 · Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.2 · High · EPSS 2.6% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • vite

    Versions
    • >= 8.0.0, < 8.0.5: Affected
    • >= 7.0.0, < 7.3.2: Affected
    • >= 6.0.0, < 6.4.2: Affected

    No fix published

  • vite-plus

    Versions
    • < 0.1.16: Affected

    No fix published

  • vite npm

    Affected ranges
    • SEMVER: ≥ 8.0.0, < 8.0.5

    Update to 8.0.5

  • vite npm

    Affected ranges
    • SEMVER: ≥ 7.0.0, < 7.3.2

    Update to 7.3.2

  • vite npm

    Affected ranges
    • SEMVER: ≥ 6.0.0, < 6.4.2

    Update to 6.4.2

Original sources

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