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CVE-2026-82260— SvelteKit before 2.52.2 Memory 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（@sveltejs/kit）版本 >=2.49.0 且 <=2.52.1，在启用实验性远程函数（ ）和表单功能时，其远程表单反序列化机制存在内存耗尽漏洞。畸形表单数据可能导致过多的内存分配，从而引发服务器进程崩溃，造成服务拒绝（DoS）。该问题已在 2.52.2 版本中修复。

CVSS 7.5 · High
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I. Basic Information for CVE-2026-82260

Vulnerability Information
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Vulnerability Title
SvelteKit before 2.52.2 Memory 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 (experimental.remoteFunctions) and form enabled contain a memory exhaustion vulnerability in remote form deserialization. Malformed form data can cause excessive memory allocation, crashing the server process and 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

Affected Products

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

II. Public POCs for CVE-2026-82260

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III. Intelligence Information for CVE-2026-82260

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Vendor Advisories for CVE-2026-82260 (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-2026-82261 7.5 HIGH SvelteKit before 2.52.2 CPU 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-2026-82260

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