CVE-2026-82261: Svelte Sveltekit

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 while processing the request, resulting in denial of service. Fixed in 2.52.2.

Affected products

• Svelte Sveltekit: from 2.49.0, before 2.52.2 (fixed in 2.52.2)

Published 2026-08-28. Last modified 2026-10-08.