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I. Basic Information for CVE-2026-34525
Vulnerability Information
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Vulnerability Title
AIOHTTP: Duplicate Host header accepted
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, multiple Host headers were allowed in aiohttp. 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
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
aiohttp 环境问题漏洞
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之前版本存在环境问题漏洞，该漏洞源于aiohttp允许多个Host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-2026-34525
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III. Intelligence Information for CVE-2026-34525
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IV. Related Vulnerabilities
Same product: aiohttp
Same vendor: aio-libs
Same weakness: CWE-20
V. Comments for CVE-2026-34525

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