AI description
CVE-2025-67647 is a vulnerability affecting the Svelte ecosystem, specifically the `@sveltejs/kit` and `@sveltejs/adapter-node` packages. This flaw can lead to a denial of service (DoS) and, under certain conditions, a Server-Side Request Forgery (SSRF) when prerendering is utilized. Users are susceptible to a denial of service if they are running `@sveltejs/kit` versions 2.44.0 through 2.49.4 and their application includes at least one prerendered route. The vulnerability extends to both DoS and SSRF if `@sveltejs/kit` versions 2.19.0 through 2.49.4 are in use, the app has a prerendered route, and `@sveltejs/adapter-node` is deployed without a configured `ORIGIN` environment variable or a reverse proxy with Host header validation.
- 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.
- Source
- security-advisories@github.com
- NVD status
- Awaiting Analysis
CVSS 4.0
- Type
- Secondary
- Base score
- 8.4
- Impact score
- -
- Exploitability score
- -
- Vector string
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- HIGH
- security-advisories@github.com
- CWE-248
Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.
- Hype score
10
Happy to publish our first research of the year on the SvelteKit framework, downloaded over 800,000 times per week, which led to CVE-2025-67647 (w/@inzo____): Avoiding the paradox: A native full-read SSRF and one‑shot DoS in SvelteKit https://t.co/ZhWSK6Ugp3 Enjoy the read
@zhero___
16 Jan 2026
5406 Impressions
32 Retweets
180 Likes
74 Bookmarks
5 Replies
0 Quotes
CVE-2025-67647 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 fo… https://t.co/jEqek1bwAy
@CVEnew
15 Jan 2026
97 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes