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    CVE-2026-34516

    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.

    Published:Apr 1, 2026
    Last Modified:Apr 15, 2026
    EPS:Apr 1, 2026
    EPSS Score:0.0005
    CVSS Score:7.5

    Affected Products

    Vendor
    Aio-libs
    Product
    Aiohttp
    Vendor
    Aiohttp
    Product
    Aiohttp

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-54278 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanu…
    CVE-2026-54277 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, it is possibl…
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    CVE-2026-54274 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacke…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High