What’s Vulnerable › Vulnerabilities

CVE-2026-114063: SvelteKit 2.10.0 before 3.0.0 Path Traversal via vite preview on Windows

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-21 · updated 2026-10-27
• Weakness: CWE-22

Description

SvelteKit (@sveltejs/kit) from 2.10.0 before 3.0.0 contains a path traversal vulnerability in the vite preview server on Windows that allows unauthenticated attackers to read files outside the prerendered output directory. Attackers who can reach the preview server through network access or a tunnel can send crafted requests to expose source code, configuration, or credentials readable by the server process.

Affected products

• sveltejs kit: from 2.10.0 before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: sveltejs kit 3.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-xgrj-p7pg-6vm3
• https://www.vulncheck.com/advisories/sveltekit-2.10.0-before-3.0.0-path-traversal-via-vite-preview-on-windows

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