6.9
Medium
CVE-2026-59881 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory consumption. This issue is fixed in version 3.14.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttp 3.14 | earliest → < 3.14.2 | 3.14.2 |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of aiohttp
The 53 CVEs of aiohttp →
CVE-2026-111750
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
6.3
Medium
CVE-2026-111749
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
2.3
Low
CVE-2026-111748
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
6.3
Medium
CVE-2026-111066
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
8.2
High