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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mqqc-3gqh-h2x8 AIOHTTP has unicode match groups in regexes for ASCII protocol elements
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 06 Jan 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 06 Jan 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Aio-libs
Aio-libs aiohttp Session
Aio-libs Project
Aio-libs Project aiohttp
Aiohttp
Aiohttp aio-libs
Aiohttp aiohttp
Vendors & Products Aio-libs
Aio-libs aiohttp Session
Aio-libs Project
Aio-libs Project aiohttp
Aiohttp
Aiohttp aio-libs
Aiohttp aiohttp

Tue, 06 Jan 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}

threat_severity

Low


Mon, 05 Jan 2026 23:30:00 +0000

Type Values Removed Values Added
Description 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.
Title AIOHTTP Regex Mismatch Allows Unicode in ASCII-Only Protocol Fields
Weaknesses CWE-444
References
Metrics cvssV4_0

{'score': 2.7, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-06T19:02:59.048Z

Reserved: 2025-12-29T20:52:59.444Z

Link: CVE-2025-69225

cve-icon Vulnrichment

Updated: 2026-01-06T14:25:21.965Z

cve-icon NVD

Status : Received

Published: 2026-01-06T00:15:47.870

Modified: 2026-01-06T00:15:47.870

Link: CVE-2025-69225

cve-icon Redhat

Severity : Low

Publid Date: 2026-01-05T23:16:19Z

Links: CVE-2025-69225 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-06T14:16:28Z

Weaknesses