AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow for an infinite loop to occur when assert statements are bypassed, resulting in a DoS attack when processing a POST body. If optimizations are enabled (-O or PYTHONOPTIMIZE=1), and the application includes a handler that uses the Request.post() method, then an attacker may be able to execute a DoS attack with a specially crafted message. This issue is fixed in version 3.13.3.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jj3x-wxrx-4x23 AIOHTTP vulnerable to DoS when bypassing asserts
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

Moderate


Mon, 05 Jan 2026 23:45:00 +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 allow for an infinite loop to occur when assert statements are bypassed, resulting in a DoS attack when processing a POST body. If optimizations are enabled (-O or PYTHONOPTIMIZE=1), and the application includes a handler that uses the Request.post() method, then an attacker may be able to execute a DoS attack with a specially crafted message. This issue is fixed in version 3.13.3.
Title AIOHTTP vulnerable to DoS when bypassing asserts
Weaknesses CWE-835
References
Metrics cvssV4_0

{'score': 6.6, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-06T19:02:48.192Z

Reserved: 2025-12-29T20:53:19.433Z

Link: CVE-2025-69227

cve-icon Vulnrichment

Updated: 2026-01-06T14:25:14.937Z

cve-icon NVD

Status : Received

Published: 2026-01-06T00:15:48.053

Modified: 2026-01-06T00:15:48.053

Link: CVE-2025-69227

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-05T23:19:31Z

Links: CVE-2025-69227 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-06T14:16:21Z

Weaknesses