CVE-2026-82261

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Sveltekit

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

svelte sveltekit2.52.2 or later
@sveltejs/kit2.52.2 or later

Vendor advisories

github.com/sveltejs/kit/security/advisories/GHSA-88qp-p4qg-rqm6

Affected products

Product	Affected versions	Fixed in
svelte sveltekit	2.49.0 ≤ v < 2.52.2	2.52.2
@sveltejs/kitnpm	2.49.0 ≤ v < 2.52.2	2.52.2

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