CVE-2025-69225 LOW

CVE-2025-69225: AIOHTTP Regex Mismatch Allows Unicode in ASCII-Only Protocol Fields

Vendor Aio-Libs
Product aiohttp
Weakness CWE-444
Published January 5, 2026
Last update January 6, 2026
View on NVD All CVEs

CVSS base score

2.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.

Key dates

02Disclosure timeline

January 5, 2026 CVE published
January 6, 2026 Record updated