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I. Basic Information for CVE-2026-40073
Vulnerability Information

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Vulnerability Title
SvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter-node
Source: NVD (National Vulnerability Database)
Vulnerability Description
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, under certain circumstances, requests could bypass the BODY_SIZE_LIMIT on SvelteKit applications running with adapter-node. This bypass does not affect body size limits at other layers of the application stack, so limits enforced in the WAF, gateway, or at the platform level are unaffected. This vulnerability is fixed in 2.57.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
SvelteKit 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SvelteKit是Svelte开源的一套Web 开发框架。 SvelteKit 2.57.1之前版本存在安全漏洞,该漏洞源于特定情况下请求可绕过BODY_SIZE_LIMIT,可能导致拒绝服务攻击。
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
VendorProductAffected VersionsCPESubscribe
sveltejskit < 2.57.1 -
II. Public POCs for CVE-2026-40073
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III. Intelligence Information for CVE-2026-40073
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IV. Related Vulnerabilities
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