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I. Basic Information for CVE-2026-27119
Vulnerability Information

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Vulnerability Title
Svelte affected by XSS in SSR `<option>` element
Source: NVD (National Vulnerability Database)
Vulnerability Description
svelte performance oriented web framework. From 5.39.3, <=5.51.4, in certain circumstances, the server-side rendering output of an <option> element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Svelte 跨站脚本漏洞
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 5.39.3版本至5.51.4版本存在跨站脚本漏洞,该漏洞源于服务器端渲染输出未正确转义内容,可能导致HTML注入。
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
sveltejssvelte >= 5.39.3, < 5.51.5 -
II. Public POCs for CVE-2026-27119
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III. Intelligence Information for CVE-2026-27119
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IV. Related Vulnerabilities
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