{"action":"Upgrade tornado to 6.5.6 or later.","affected":[{"fixed":"6.5.6","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2026-49853"],"ecosystem":"PyPI","epss":0.00445,"exploited":false,"fixed_versions":["6.5.6"],"ghsa_id":"GHSA-3x9g-8vmp-wqvf","id":"tcs_01M5KEWSAHSX1QP0X8B9WQB4R6","modified_at":"2026-09-10T03:50:55.306087854Z","published_at":"2026-06-15T20:20:00Z","references":["https://osv.dev/vulnerability/GHSA-3x9g-8vmp-wqvf","https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf","https://github.com/tornadoweb/tornado"],"severity":{"label":"high","score":7.7},"sources":[{"source":"osv","source_id":"GHSA-3x9g-8vmp-wqvf","url":"https://osv.dev/vulnerability/GHSA-3x9g-8vmp-wqvf"}],"summary":"Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient"}