{"action":"Upgrade tornado to 6.5.8 or later.","affected":[{"fixed":"6.5.8","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2026-82397"],"ecosystem":"PyPI","epss":0.00346,"exploited":false,"fixed_versions":["6.5.8"],"ghsa_id":"GHSA-mpf4-983q-p7j4","id":"tcs_01M5KH8N2XFBM2XGZ6NHD1NB26","modified_at":"2026-09-10T12:15:15.559565535Z","published_at":"2026-09-10T09:44:59.496635Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3928","https://github.com/tornadoweb/tornado/security/advisories/GHSA-mpf4-983q-p7j4","https://nvd.nist.gov/vuln/detail/CVE-2026-82397","https://github.com/tornadoweb/tornado/pull/3704","https://github.com/tornadoweb/tornado/commit/8d6363ed7b69d5f0da806efe34d256627a2191de","https://github.com/tornadoweb/tornado","https://github.com/tornadoweb/tornado/releases/tag/v6.5.8","https://pypi.org/project/tornado","https://github.com/advisories/GHSA-mpf4-983q-p7j4"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-3928","url":"https://osv.dev/vulnerability/PYSEC-2026-3928"}],"summary":"Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop"}