Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, reading multiple invalid cookies can lead to a logging storm. If the cookies attribute is accessed in an application, then an attacker may be able to trigger a storm of warning-level logs using a specially crafted Cookie header. This issue is fixed in 3.13.3.
References (2)
Core 2
Core References
Vendor Advisory, Patch x_refsource_confirm
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-fh55-r93g-j68g
Scores
CVSS v3
5.3
EPSS
0.0001
EPSS Percentile
2.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-779
Status
published
Products (2)
aiohttp/aiohttp
< 3.13.3
pypi/aiohttp
0 - 3.13.3PyPI
Published
Jan 06, 2026
Tracked Since
Feb 18, 2026