https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-14T19:45:51.328651+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/ghsa-4m7w-qmgq-4wj5 GHSA-4m7w-qmgq-4wj5 — aiohttp: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections 2026-10-14T19:45:51.344824+00:00

Affected: PyPI: aiohttp

### 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.

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