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CVE-2026-22774— devalue vulnerable to denial of service due to memory exhaustion in devalue.parse

CVSS 7.5 · High EPSS 0.58% · P45

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProductVersion RangeStatus
sveltejsdevalue>= 5.3.0, < 5.6.2affected
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I. Basic Information for CVE-2026-22774

Vulnerability Information
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Vulnerability Title
devalue vulnerable to denial of service due to memory exhaustion in devalue.parse
Source: CVE Program / CVE List V5
Vulnerability Description
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.3.0 to 5.6.1, certain inputs can cause devalue.parse to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using devalue.parse on externally-supplied data. The root cause is the typed array hydration expecting an ArrayBuffer as input, but not checking the assumption before creating the typed array. This vulnerability is fixed in 5.6.2.
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
不对称的资源消耗(放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
Svelte 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Svelte是Svelte开源的一种构建 Web 应用程序的新方法。 Svelte 5.3.0版本至5.6.1版本存在安全漏洞，该漏洞源于类型化数组水合过程未检查输入假设，可能导致拒绝服务。
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

VendorProductAffected VersionsCPESubscribe
sveltejsdevalue >= 5.3.0, < 5.6.2 -

II. Public POCs for CVE-2026-22774

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9918 chars
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III. Intelligence Information for CVE-2026-22774

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Same Patch Batch · sveltejs · 2026-01-15 · 4 CVEs total

CVE-2026-227757.5 HIGHdevalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse
CVE-2025-67647SvelteKit Denial of service and possible SSRF when using prerendering
CVE-2026-22803SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer

IV. Related Vulnerabilities

Same product: devalue
Same vendor: sveltejs
Same weakness: CWE-405

V. Comments for CVE-2026-22774

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