CVE-2025-67647
published 2026-01-15CVE-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…
PriorityP356critical9.1CVSS 3.1
AVNACLPRNUINSUCHINAH
EPSS
0.47%
37.2th percentile
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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| svelte | adapter-node | >= 5.4.1 < 5.5.1 | 5.5.1 |
| svelte | kit | >= 2.19.0 < 2.49.5 | 2.49.5 |
| sveltejs | adapter-node | >= 5.4.1 < 5.5.1 | 5.5.1 |
| sveltejs | kit | — | — |
| sveltejs | kit | >= 2.19.0 < 2.49.5 | 2.49.5 |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
nvdv4.08.4HIGHCVSS: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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
osv·2026-01-15
CVE-2025-67647 [HIGH] SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
### Summary
Versions of SvelteKit are vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions.
### Details
Affected versions from 2.44.0 onwards are vulnerable to DoS if:
- your app has at least one prerendered route (`export const prerender = true`)
Affected versions from 2.19.0 onwards are vulnerable to DoS and SSRF if:
- your app has at least one prerendered route (`export const prerender = true`)
- 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
### Impact
The DoS causes the running server process to end.
The SSRF allows access to
GHSA
SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
ghsa·2026-01-15
CVE-2025-67647 [HIGH] CWE-248 SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering
### Summary
Versions of SvelteKit are vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions.
### Details
Affected versions from 2.44.0 onwards are vulnerable to DoS if:
- your app has at least one prerendered route (`export const prerender = true`)
Affected versions from 2.19.0 onwards are vulnerable to DoS and SSRF if:
- your app has at least one prerendered route (`export const prerender = true`)
- 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
### Impact
The DoS causes the running server process to end.
The SSRF allows access to
No detection rules found.
No public exploits indexed.
2026-01-15
Published