{"action":"Upgrade aiohttp to 3.13.4 or later.","affected":[{"fixed":"3.13.4","introduced":"0"}],"component":"aiohttp","cve_ids":["CVE-2026-34513"],"ecosystem":"PyPI","epss":0.00457,"exploited":false,"fixed_versions":["3.13.4"],"ghsa_id":"GHSA-hcc4-c3v8-rx92","id":"tcs_01M5KGXEQ7B49589WBPZM7QXC5","modified_at":"2026-07-13T07:15:20.515103859Z","published_at":"2026-04-01T21:16:59.267Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2095","https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4","https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hcc4-c3v8-rx92"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2095","url":"https://osv.dev/vulnerability/PYSEC-2026-2095"}],"summary":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situa"}