{"action":"Upgrade aiohttp to 3.13.4 or later.","affected":[{"fixed":"3.13.4","introduced":"0"}],"component":"aiohttp","cve_ids":["CVE-2026-34517"],"ecosystem":"PyPI","epss":0.00507,"exploited":false,"fixed_versions":["3.13.4"],"ghsa_id":"GHSA-3wq7-rqq7-wx6j","id":"tcs_01M5KGXFB50VCAG4P3JDQRTT27","modified_at":"2026-07-13T07:15:20.410799609Z","published_at":"2026-04-01T21:16:59.870Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2099","https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4","https://github.com/aio-libs/aiohttp/commit/cbb774f38330563422ca0c413a71021d7b944145","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-3wq7-rqq7-wx6j"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-2099","url":"https://osv.dev/vulnerability/PYSEC-2026-2099"}],"summary":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clien"}