{"action":"Upgrade aiohttp to 3.13.4 or later.","affected":[{"fixed":"3.13.4","introduced":"0"}],"component":"aiohttp","cve_ids":["CVE-2026-34518"],"ecosystem":"PyPI","epss":0.0035,"exploited":false,"fixed_versions":["3.13.4"],"ghsa_id":"GHSA-966j-vmvw-g2g9","id":"tcs_01M5KF9YM05Q9ZSSRZKAX8CX3H","modified_at":"2026-09-10T03:51:01.374434696Z","published_at":"2026-04-01T21:47:46Z","references":["https://osv.dev/vulnerability/GHSA-966j-vmvw-g2g9","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-966j-vmvw-g2g9","https://nvd.nist.gov/vuln/detail/CVE-2026-34518","https://github.com/aio-libs/aiohttp/commit/5351c980dcec7ad385730efdf4e1f4338b24fdb6","https://github.com/aio-libs/aiohttp","https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-966j-vmvw-g2g9","url":"https://osv.dev/vulnerability/GHSA-966j-vmvw-g2g9"}],"summary":"AIOHTTP leaks Cookie and Proxy-Authorization headers on cross-origin redirect"}