CVE-2025-67647

CRITICAL

9.1

Description

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route (export const prerender = true). From 2.19.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route and you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation. This vulnerability is fixed in 2.49.5.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/15/2026

Last Modified1/21/2026

Sourcenvd

Honeypot Sightings0

Affected Products

svelte:adapter-nodesvelte:kit

Weaknesses (CWE)

CWE-248CWE-918CWE-918

References

https://github.com/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226(security-advisories@github.com)

https://github.com/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35(security-advisories@github.com)

IOC Correlations

No correlations recorded

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