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.
History

Wed, 21 Jan 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Svelte adapter-node
CPEs cpe:2.3:a:svelte:adapter-node:*:*:*:*:*:node.js:*:*
cpe:2.3:a:svelte:kit:*:*:*:*:*:node.js:*:*
Vendors & Products Svelte adapter-node
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}


Fri, 16 Jan 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Svelte
Svelte kit
Vendors & Products Svelte
Svelte kit

Thu, 15 Jan 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Jan 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title SvelteKit Denial of service and possible SSRF when using prerendering
Weaknesses CWE-248
CWE-918
References
Metrics cvssV4_0

{'score': 8.4, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-15T18:58:01.975Z

Reserved: 2025-12-09T18:36:41.331Z

Link: CVE-2025-67647

cve-icon Vulnrichment

Updated: 2026-01-15T18:57:51.654Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-15T19:16:03.870

Modified: 2026-01-21T20:37:37.653

Link: CVE-2025-67647

cve-icon Redhat

No data.