aiohttp: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections

CAO 7.5CVE-2026-54275 · GHSA-4m7w-qmgq-4wj5 · PYSEC-2026-237 · Công bố 22/06/2026 · cập nhật 25/10/2026

Tóm tắt nhanh

CVE-2026-54275 là lỗ hổng mức CAO (CVSS 7.5) ảnh hưởng aiohttp, aiohttp (aiohttp).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.47%, cao hơn 40.7% các lỗ hổng khác.
Cách xử lý: cập nhật lên 3.14.1 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
aiohttp PyPI	`< 3.14.1`	`3.14.1`
aiohttp aiohttp	`< 3.14.1`	`3.14.1`

Mô tả

Summary

The server_hostname TLS SNI check can be bypassed when an existing connection is reused.

Impact

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.

Workaround

Disable keep_alive if you need to change the server_hostname check between requests.

Patch: https://github.com/aio-libs/aiohttp/commit/0ca2b6c28a25726527a8b60f25960262a91ed0e0

Mô tả của NVD

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.