5.3Medium
Aiohttp Aiohttp
CVE-2025-69230
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.
What this means for your business
- It affects Aiohttp. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Aiohttp, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.3 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- CVSS v4
- 2.7
- Weakness
- CWE-779
- Assigned by
- security-advisories@github.com
Dates
- Published
- 2026-01-06
- Last modified
- 2026-09-17
- Sources
- NVD
Affected products
- Aiohttp Aiohttp3.12.7 - 3.13.3
As listed in the NVD configuration data. Not a statement about your estate.