CVE-2026-82257: Svelte Sveltekit

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality.

Affected products

• Svelte Sveltekit: before 2.69.1 (fixed in 2.69.1)

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