Svelte vulnerabilities
We track 7 vulnerabilities in Svelte products across 2 products. 7 are rated high or critical, and none are known to be exploited. The most recent was published on August 28, 2026.
Latest Svelte vulnerabilities
- 7.5 High severity
kit: Uncontrolled Resource Consumption
SvelteKit (@sveltejs/kit) versions >=2.49.0 and <=2.52.1 with experimental remote functions and form enabled contain a CPU exhaustion vulnerability in form deserialization. An attacker can send malformed form data to cause the server to become unresponsive whi
- 7.5 High severity
kit: Uncontrolled Resource Consumption
SvelteKit (@sveltejs/kit) versions >=2.49.0 and <=2.52.1 with experimental remote functions (experimental.remoteFunctions) and form enabled contain a memory exhaustion vulnerability in remote form deserialization. Malformed form data can cause excessive memory
- 7.5 High severity
kit: Deserialization of Untrusted Data
SvelteKit versions from 2.49.0 through 2.53.2 (fixed in 2.53.3) contain a deserialization expansion issue in the experimental form remote function. When an application enables experimental.remoteFunctions and uses the form function to process the files array w
- 9.1 Critical severity
kit: Server-Side Request Forgery
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,
- 7.5 High severity
SvelteKit is a web development kit. In SvelteKit 2, sending a GET request with a body eg `{}`…
SvelteKit is a web development kit. In SvelteKit 2, sending a GET request with a body eg `{}` to a built and previewed/hosted sveltekit app throws `Request with GET/HEAD method cannot have body.` and crashes the preview/hosting. After this happens, one must ma
- 8.8 High severity
kit: Cross-Site Request Forgery
The SvelteKit framework offers developers an option to create simple REST APIs. This is done by defining a `+server.js` file, containing endpoint handlers for different HTTP methods. SvelteKit provides out-of-the-box cross-site request forgery (CSRF) protectio
- 8.8 High severity
kit: Cross-Site Request Forgery
SvelteKit is a web development framework. The SvelteKit framework offers developers an option to create simple REST APIs. This is done by defining a `+server.js` file, containing endpoint handlers for different HTTP methods. SvelteKit provides out-of-the-box c