high7.5
CVE-2026-39363
Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | vite | >= 8.0.0, <= 8.0.4 | 8.0.5 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vitejs | Vite | from 6.0.0 through 6.4.1 from 7.0.0 through 7.3.1 from 8.0.0 through 8.0.4 |
| Voidzero | Vite\+ | through 0.1.15 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p9ff-h696-f583
- https://github.com/vitejs/vite/security/advisories/GHSA-p9ff-h696-f583
- https://github.com/vitejs/vite/pull/22159
- https://github.com/vitejs/vite/commit/f02d9fde0b195afe3ea2944414186962fbbe41e0
- https://github.com/vitejs/vite/releases/tag/v6.4.2
- https://github.com/vitejs/vite/releases/tag/v7.3.2
- https://github.com/vitejs/vite/releases/tag/v8.0.5
- https://nvd.nist.gov/vuln/detail/CVE-2026-39363
- https://access.redhat.com/errata/RHSA-2026:24761
- https://access.redhat.com/errata/RHSA-2026:24762
- https://access.redhat.com/errata/RHSA-2026:24866
- https://access.redhat.com/errata/RHSA-2026:59153
- https://access.redhat.com/security/cve/CVE-2026-39363
- https://bugzilla.redhat.com/show_bug.cgi?id=2456179
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39363.json