---
id: CVE-2026-82261
title: >-
  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
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
vendor: svelte
product: sveltekit
affected:
  - 'sveltekit >= 2.49.0, < 2.52.2'
patched:
  - sveltekit 2.52.2
published: '2026-08-28'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:48.980'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82261'
references:
  - url: 'https://github.com/sveltejs/kit/security/advisories/GHSA-88qp-p4qg-rqm6'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sveltekit-before-2.52.2-cpu-exhaustion-via-remote-form-deserialization
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-28T14:40:51.226980Z'
epss: 0.00493
epssPercentile: 0.40379
ingestedAt: '2026-10-08T16:52:14.734Z'
---

## Overview

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

- `sveltekit >= 2.49.0, < 2.52.2`

## Remediation

Upgrade past the affected range:

- `sveltekit 2.52.2`