Security Advisory

CVE-2026-54275

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-22 16:34:56

Last updated 2026-06-22 17:27:34

Assigner GitHub_M

CVSS score 2.7

State PUBLISHED

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request server_hostname parameters, then the later calls may succeed by reusing the existing connection when they should have been rejected due to the TLS SNI check. This vulnerability is fixed in 3.14.1.

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