{"action":"Upgrade aiohttp to 3.14.1 or later.","affected":[{"fixed":"3.14.1","introduced":"0"}],"component":"aiohttp","cve_ids":["CVE-2026-54275"],"ecosystem":"PyPI","epss":0.0047,"exploited":false,"fixed_versions":["3.14.1"],"ghsa_id":"GHSA-4m7w-qmgq-4wj5","id":"tcs_01M5KGZ21V6J4661F7MWQ2XXAR","modified_at":"2026-06-27T11:15:05.309750506Z","published_at":"2026-06-22T18:16:46.010Z","references":["https://osv.dev/vulnerability/PYSEC-2026-237","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-4m7w-qmgq-4wj5"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-237","url":"https://osv.dev/vulnerability/PYSEC-2026-237"}],"summary":"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 applicat"}