CVE-2026-27118 Cache poisoning in @sveltejs/adapter-vercel

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Versions of @sveltejs/adapter-vercel prior to 6.3.2 are vulnerable to cache poisoning. An internal query parameter intended for Incremental Static Regeneration ISR is accessible on all routes, allowi...

CVE-2026-27118

CVE-2026-27118 affects the SvelteKit adapter for Vercel: versions prior to 6.3.2 are vulnerable to cache poisoning due to an internal ISR query parameter that is exposed on all routes. An attacker can trigger caching of sensitive user-specific responses to other users if a victim visits a crafted...