CVE-2026-22803— SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer
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I. Basic Information for CVE-2026-22803
Vulnerability Information
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Vulnerability Title
SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer
Source: NVD (National Vulnerability Database)
Vulnerability Description
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From 2.49.0 to 2.49.4, the experimental form remote function uses a binary data format containing a representation of submitted form data. A specially-crafted payload can cause the server to allocate a large amount of memory, causing DoS via memory exhaustion. This vulnerability is fixed in 2.49.5.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
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 2.49.0版本至2.49.4版本存在安全漏洞，该漏洞源于实验性表单远程函数处理特制有效载荷不当，可能导致内存耗尽拒绝服务。
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
II. Public POCs for CVE-2026-22803
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Same Patch Batch · sveltejs · 2026-01-15 · 4 CVEs total
| CVE-2026-22774 | 7.5 HIGH | devalue vulnerable to denial of service due to memory exhaustion in devalue.parse |
| CVE-2026-22775 | 7.5 HIGH | devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse |
| CVE-2025-67647 | SvelteKit Denial of service and possible SSRF when using prerendering |
IV. Related Vulnerabilities
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Same vendor: sveltejs
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V. Comments for CVE-2026-22803
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