{"action":"Upgrade aiohttp to 3.14.2 or later.","affected":[{"fixed":"3.14.2","introduced":"0"}],"component":"aiohttp","cve_ids":["CVE-2026-59881"],"ecosystem":"PyPI","epss":0.00524,"exploited":false,"fixed_versions":["3.14.2"],"ghsa_id":"GHSA-mq44-7p77-q5h7","id":"tcs_01M5KH5Z0AG5GJ82T3XK3NSV77","modified_at":"2026-08-04T14:30:14.644343094Z","published_at":"2026-08-04T11:34:46.955491Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3547","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mq44-7p77-q5h7","https://nvd.nist.gov/vuln/detail/CVE-2026-59881","https://github.com/aio-libs/aiohttp/pull/12978","https://github.com/aio-libs/aiohttp/commit/47fb6ae354d4fa22048f4dbe7dbf82b625f0a2f6","https://github.com/aio-libs/aiohttp","http://github.com/aio-libs/aiohttp/releases/tag/v3.14.2","https://pypi.org/project/aiohttp","https://github.com/advisories/GHSA-mq44-7p77-q5h7"],"severity":{"label":"medium","score":6.9},"sources":[{"source":"osv","source_id":"PYSEC-2026-3547","url":"https://osv.dev/vulnerability/PYSEC-2026-3547"},{"source":"nvd","source_id":"CVE-2026-59881","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59881"}],"summary":"AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate"}