CVE-2025-69227

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/aio-libs/aiohttp/commit/bc1319ec3cbff9438a758951a30907b072561259	Patch
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jj3x-wxrx-4x23	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

History

14 Jan 2026, 19:16

Type	Values Removed	Values Added
First Time		Aiohttp aiohttp Aiohttp
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/aio-libs/aiohttp/commit/bc1319ec3cbff9438a758951a30907b072561259 -~~	() https://github.com/aio-libs/aiohttp/commit/bc1319ec3cbff9438a758951a30907b072561259 - Patch
References	~~() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jj3x-wxrx-4x23 -~~	() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jj3x-wxrx-4x23 - Vendor Advisory
CPE		cpe:2.3:a:aiohttp:aiohttp::::::::

06 Jan 2026, 00:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-06 00:15

Updated : 2026-01-14 19:16

NVD link : CVE-2025-69227

Mitre link : CVE-2025-69227

CVE.ORG link : CVE-2025-69227

JSON object : View

Products Affected

aiohttp

aiohttp

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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