CVE-2026-54274
High
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1.
SeverityHigh
CVSS7.5
Exploit probability—
ProductAiohttp
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- aiohttp aiohttp3.14.1 or later
- aiohttp3.14.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttp aiohttp | v < 3.14.1 | 3.14.1 |
| aiohttpPyPI | v < 3.14.1 | 3.14.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.