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

30 Sep 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) AIOHTTP es un framework HTTP cliente/servidor asíncrono para asyncio y Python. Las versiones 3.13.2 e inferiores permiten que se produzca un bucle infinito cuando se omiten las sentencias assert, lo que resulta en un ataque de DoS al procesar un cuerpo POST. Si las optimizaciones están habilitadas (-O o PYTHONOPTIMIZE=1), y la aplicación incluye un manejador que utiliza el método Request.post(), entonces un atacante podría ejecutar un ataque de DoS con un mensaje especialmente diseñado. Este problema está solucionado en la versión 3.13.3.

Information

Published : 2026-01-06 00:15

Updated : 2026-10-11 20:10

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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