CVE-2026-393637.5HighCWE-200

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

vitejs · vite

Fixed in 6.4.2 · Affected: vitejs before 6.4.2 · Exploitation: check available, not yet exploited

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

3.4%probability of exploitation in the next 30 days

89th percentile

050100

Higher than 89% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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 products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

vitejs · vite>= 8.0.0, < 8.0.5; >= 7.0.0, < 7.3.2; >= 6.0.0, < 6.4.2
vitejs · vite-plus< 0.1.16

On the Atlas

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Open the Atlas

Exploitation: Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
CISA KEV: Not listed
Public check: Vite Dev Server - Arbitrary File Read · nuclei template in projectdiscovery/nuclei-templates
Weakness: Information Exposure · Information Disclosure
Vendor: vitejs
Published: April 2026
Band: Check available, not yet exploited, April 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-39363 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.