{"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":0.0044,"exploited":false,"fixed_versions":["3.13.4"],"ghsa_id":"GHSA-hcc4-c3v8-rx92","id":"tcs_01M5KFKE2GSX68VCDGT20KET6R","modified_at":"2026-09-10T03:51:02.067006429Z","published_at":"2026-04-01T21:19:22Z","references":["https://osv.dev/vulnerability/GHSA-hcc4-c3v8-rx92","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hcc4-c3v8-rx92","https://nvd.nist.gov/vuln/detail/CVE-2026-34513","https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98","https://github.com/aio-libs/aiohttp","https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-hcc4-c3v8-rx92","url":"https://osv.dev/vulnerability/GHSA-hcc4-c3v8-rx92"}],"summary":"AIOHTTP Affected by Denial of Service (DoS) via Unbounded DNS Cache in TCPConnector"}