Vulnerability · Published Oct 21, 2026 · Assigned by VulnCheck

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

High 7.5

In plain English

A high-severity path traversal in kit from sveltejs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 65.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
sveltejs	kit	2.10.0 – before 3.0.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-xgrj-p7pg-6vm3) vendor-advisory
VulnCheck Advisory: SvelteKit 2.10.0 before 3.0.0 Path Traversal via vite preview on Windows third-party-advisory