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I. Basic Information for CVE-2026-34518
Vulnerability Information

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Vulnerability Title
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect
Source: NVD (National Vulnerability Database)
Vulnerability Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
aiohttp 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aiohttp是aio-libs开源的一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 aiohttp 3.13.4之前版本存在信息泄露漏洞,该漏洞源于在重定向到不同来源时,aiohttp丢弃Authorization标头但保留Cookie和Proxy-Authorization标头。
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
aio-libsaiohttp < 3.13.4 -
II. Public POCs for CVE-2026-34518
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III. Intelligence Information for CVE-2026-34518
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