#VU120990 Improper handling of highly compressed data in aiohttp - CVE-2025-69223
Published: January 6, 2026
Vulnerability identifier: #VU120990
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-69223
CWE-ID: CWE-409
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
aiohttp
aiohttp
Software vendor:
aio-libs
aio-libs
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the application does not properly handle highly compressed data within the auto_decompress feature. A remote attacker can send a specially crafted compressed HTTP request to the server and consume all available memory resources.
Remediation
Install updates from vendor's website.