CVE-2026-114063

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductSveltejs Kit

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

sveltejs kit3.0.0 or later

Vendor advisories

github.com/sveltejs/kit/security/advisories/GHSA-xgrj-p7pg-6vm3

Affected products

Product	Affected versions	Fixed in
sveltejs kit	2.10.0 ≤ v < 3.0.0	3.0.0

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