VULNERABILITY INTELLIGENCE
CVE-2026-59881
EPSS probability0.52%
CISA KEVNot currently listed
Published2026-07-30
Last modified2026-10-23
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.
Weakness classification
- security-advisories@github.com: CWE-20