CVE-2026-82256

Medium

Description

SvelteKit before 2.69.1 fails to properly validate remote form function payload sizes, allowing attackers to crash the Node process by sending large payloads. Repeated exploitation causes denial of service by repeatedly crashing the application process.

SeverityMedium

CVSS5.3

Exploit probability—

Product

Sveltekit

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

svelte sveltekit2.69.1 or later
@sveltejs/kit2.69.1 or later

Vendor advisories

github.com/sveltejs/kit/security/advisories/GHSA-wqjv-9729-c5q2

Affected products

Product	Affected versions	Fixed in
svelte sveltekit	v < 2.69.1	2.69.1
@sveltejs/kitnpm	v < 2.69.1	2.69.1

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