CVE-2026-40074 — SvelteKit's invalidated redirect in handle hook causes Denial-of-Service
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, redirect, when called from inside the handle server hook with …
Published: 2026-04-10 · CVSS: 6.3 · CVSS 4.0
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, redirect, when called from inside the handle server hook with a location parameter containing characters that are invalid in a HTTP header, will cause an unhandled TypeError. This could result in DoS on some platforms, especially if the location passed to redirect contains unsanitized user input. This vulnerability is fixed in 2.57.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7