CVE-2025-67647
SvelteKit Denial of service and possible SSRF when using prerendering
- State
- Published
- Severity
- 8.4 High
- Published
- Jan 15, 2026
- Updated
- Jan 15, 2026
- Reserved
- Dec 9, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.4 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
kitsveltejs |
|
References
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