{"action":"Upgrade tornado to 6.5.9 or later.","affected":[{"fixed":"6.5.9","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2026-103263"],"ecosystem":"PyPI","epss":0.00522,"exploited":false,"fixed_versions":["6.5.9"],"ghsa_id":"GHSA-c2m8-h5v5-343r","id":"tcs_01M5KFBZ26V8XZR492KKT561T3","modified_at":"2026-10-02T03:56:10.964622908Z","published_at":"2026-09-30T23:48:55Z","references":["https://osv.dev/vulnerability/GHSA-c2m8-h5v5-343r","https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r","https://github.com/tornadoweb/tornado/pull/3719","https://github.com/tornadoweb/tornado/commit/437ab5f76565403b3403438d2e555d11f8128d32","https://github.com/tornadoweb/tornado/commit/f9f50b8bab265a2abf9f2415a3d2da6264a5450b","https://github.com/tornadoweb/tornado","https://github.com/tornadoweb/tornado/releases/tag/v6.5.9"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GHSA-c2m8-h5v5-343r","url":"https://osv.dev/vulnerability/GHSA-c2m8-h5v5-343r"},{"source":"nvd","source_id":"CVE-2026-103263","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103263"}],"summary":"Tornado: StaticFileHandler follows symlinks outside static root (path traversal)"}