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HIGHCVE-2026-34516Published Modified CNA GitHub_M

CVE-2026-34516: AIOHTTP: Multipart Header Size Bypass

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.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • aio-libs / aiohttp
    < 3.13.4
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References