CVE-2026-53571: vite: `server.fs.deny` bypass on Windows alternate paths

June 15, 2026 (updated October 27, 2026)

The contents of files that are specified by server.fs.deny can be returned to the browser on Windows.

References

github.com/advisories/GHSA-fx2h-pf6j-xcff
github.com/vitejs/vite/security/advisories/GHSA-fx2h-pf6j-xcff
nvd.nist.gov/vuln/detail/CVE-2026-53571

Code Behaviors & Features

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