CVE-2026-22815

HIGH

AIOHTTP: Uncapped memory usage possible through aiohttp allowing unlimited trailer headers

Title source: cna
STIX 2.1

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0044
EPSS Percentile 34.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-400 CWE-770
Status published
Products (3)
aio-libs/aiohttp < 3.13.4
aiohttp/aiohttp < 3.13.4
pypi/aiohttp 0 - 3.13.4PyPI
Published Apr 01, 2026
Tracked Since Apr 02, 2026