Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-82261— SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization

Quick assessment

Affected
sveltejs kit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SvelteKit是Svelte团队开源的一个使用Svelte框架快速开发健壮、高性能 Web 应用程序的工具。 SvelteKit 2.49.0版本至2.52.1版本存在资源管理错误漏洞，该漏洞源于启用实验性远程函数和表单功能时，表单反序列化存在CPU耗尽问题，可能导致攻击者发送恶意表单数据，导致服务器在处理请求时无响应，造成拒绝服务。

CVSS 7.5 · High EPSS 0.49% · P41

Affected Version Matrix 2

VendorProduct Version RangeStatus
sveltejs kit 2.49.0< 2.52.1 affected
2.52.1 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-82261

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
SvelteKit 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SvelteKit是Svelte团队开源的一个使用Svelte框架快速开发健壮、高性能 Web 应用程序的工具。 SvelteKit 2.49.0版本至2.52.1版本存在资源管理错误漏洞，该漏洞源于启用实验性远程函数和表单功能时，表单反序列化存在CPU耗尽问题，可能导致攻击者发送恶意表单数据，导致服务器在处理请求时无响应，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sveltejs kit 2.49.0 ~ 2.52.1 -

II. Public POCs for CVE-2026-82261

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-82261

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-82261 (2)

Same Patch Batch · sveltejs · 2026-08-28 · 6 CVEs total

CVE-2026-82259 7.5 HIGH SvelteKit 2.49.0 before 2.53.3 Denial of Service via form
CVE-2026-82260 7.5 HIGH SvelteKit before 2.52.2 Memory Exhaustion via Remote Form Deserialization
CVE-2026-82258 5.9 MEDIUM SvelteKit 2.38.0 before 2.60.1 Cross-User Data Disclosure via query.batch
CVE-2026-82256 5.3 MEDIUM SvelteKit before 2.69.1 Denial of Service via Remote Form
CVE-2026-82257 4.3 MEDIUM SvelteKit before 2.69.1 Prototype Pollution via File Input

IV. Related Vulnerabilities

Same product: kit
Same vendor: sveltejs
Same weakness: CWE-400

V. Comments for CVE-2026-82261

No comments yet

Leave a comment