Sending a GET or HEAD request with a body crashes SvelteKit
Summary
In SvelteKit 2 sending a GET request with a body eg {} to a SvelteKit app in preview or with adapter-node throws Request with GET/HEAD method cannot have body. and crashes the app.
node:internal/deps/undici/undici:6066
throw new TypeError("Request with GET/HEAD method cannot have body.");
^
TypeError: Request with GET/HEAD method cannot have body.
at new Request (node:internal/deps/undici/undici:6066:17)
at getRequest (file:///C:/Users/admin/Desktop/reproduction/node_modules/@sveltejs/kit/src/exports/node/index.js:107:9)
at file:///C:/Users/admin/Desktop/reproduction/node_modules/@sveltejs/kit/src/exports/vite/preview/index.js:181:26
at call (file:///C:/Users/admin/Desktop/reproduction/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:44795:7)
at next (file:///C:/Users/admin/Desktop/reproduction/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:44739:5)
at file:///C:/Users/admin/Desktop/reproduction/node_modules/@sveltejs/kit/src/exports/vite/preview/index.js:172:6
at call (file:///C:/Users/admin/Desktop/reproduction/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:44795:7)
at next (file:///C:/Users/admin/Desktop/reproduction/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:44739:5)
at file:///C:/Users/admin/Desktop/reproduction/node_modules/@sveltejs/kit/src/exports/vite/preview/index.js:211:27
at call (file:///C:/Users/admin/Desktop/reproduction/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:44795:7)
Node.js v20.11.0TRACE requests will also cause the app to crash. Prerendered pages and SvelteKit 1 apps are not affected.
PoC
<!-- _Complete instructions, including specific configuration details, to reproduce the vulnerability._ -->First do a fresh install of SvelteKit 2 with the example app. Typescript.
npm run buildnpm run preview- Go to http://localhost:4173 (works)
- curl -X GET -d "{}" http://localhost:4173/bye
- Application crashes and http://localhost:4173 is down
Impact
<!-- _What kind of vulnerability is it? Who is impacted?_ -->Denial of Service for apps using adapter-node
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | @sveltejs/adapter-node | >= 2.0.0, < 2.1.2, >= 3.0.0, < 3.0.3, >= 4.0.0, < 4.0.1 | 2.1.2, 3.0.3, 4.0.1 |
| Paquete de npm | @sveltejs/kit | >= 2.0.0, < 2.4.3 | 2.4.3 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Debilidad (CWE)
CWE-20- Plataforma
- npm
- Paquete
@sveltejs/adapter-node, @sveltejs/kit- Publicada
- 24.01.2024
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-g5m6-hxpp-fc49 - CC BY 4.0
Historial de vulnerabilidades: @sveltejs/kit
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 17
- Primera → última
- 04.2023 08.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 6
- Media 8
- Baja 3
Divulgaciones por año
- 2023: 2
- 2024: 3
- 2025: 1
- 2026: 11
-
Sending a GET or HEAD request with a body crashes SvelteKit esta entrada
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