CVE-2026-54275

LOW SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 15, 2026

Last Modified

June 26, 2026

CWE ID

CWE-297

Source

GitHub

Vendor

pip

Product

aiohttp

External References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-4m7w-qmgq-4wj5
https://github.com/advisories/GHSA-4m7w-qmgq-4wj5

CVE-2026-54275

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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