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I. Basic Information for CVE-2025-21620
Vulnerability Information

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Vulnerability Title
Deno's authorization headers not dropped when redirecting cross-origin
Source: NVD (National Vulnerability Database)
Vulnerability Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. When you send a request with the Authorization header to one domain, and the response asks to redirect to a different domain, Deno'sfetch() redirect handling creates a follow-up redirect request that keeps the original Authorization header, leaking its content to that second domain. This vulnerability is fixed in 2.1.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Deno 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Deno是Deno开源的一个简单、现代且安全的 JavaScript 和 TypeScript 运行环境。 Deno 2.1.2之前版本存在信息泄露漏洞,该漏洞源于fetch()重定向处理会创建一个后续重定向请求,该请求会保留原始Authorization标头,并将其内容泄露给第二个域。
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
denolanddeno < 2.1.2 -
II. Public POCs for CVE-2025-21620
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III. Intelligence Information for CVE-2025-21620
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