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I. Basic Information for CVE-2026-34516
Vulnerability Information

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Vulnerability Title
AIOHTTP: Multipart Header Size Bypass
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, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. 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
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
aiohttp 安全漏洞
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之前版本存在安全漏洞,该漏洞源于包含过多多部分标头的响应可能使用超出预期的内存,可能导致拒绝服务攻击。
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-2026-34516
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III. Intelligence Information for CVE-2026-34516
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IV. Related Vulnerabilities
V. Comments for CVE-2026-34516

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