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I. Basic Information for CVE-2026-30226
Vulnerability Information

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Vulnerability Title
devalue has prototype pollution in devalue.parse and devalue.unflatten
Source: NVD (National Vulnerability Database)
Vulnerability Description
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. In devalue v5.6.3 and earlier, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion. This vulnerability is fixed in 5.6.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
devalue 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
devalue是Svelte开源的一个增强的JavaScript对象序列化库。 devalue 5.6.3及之前版本存在安全漏洞,该漏洞源于devalue.parse和devalue.unflatten容易受到通过特制有效载荷的原型污染攻击,可能导致拒绝服务或类型混淆。
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 < 5.6.4 -
II. Public POCs for CVE-2026-30226
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III. Intelligence Information for CVE-2026-30226
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IV. Related Vulnerabilities
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