CVE-2025-69230: Aiohttp

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, reading multiple invalid cookies can lead to a logging storm. If the cookies attribute is accessed in an application, then an attacker may be able to trigger a storm of warning-level logs using a specially crafted Cookie header. This issue is fixed in 3.13.3.

Affected products

• Aiohttp Aiohttp: from 3.12.7, before 3.13.3 (fixed in 3.13.3)

Published 2026-01-06. Last modified 2026-09-30.