{"action":"Upgrade tornado to 6.5.3 or later.","affected":[{"fixed":"6.5.3","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2025-67725"],"ecosystem":"PyPI","epss":0.00559,"exploited":false,"fixed_versions":["6.5.3"],"ghsa_id":"GHSA-c98p-7wgm-6p64","id":"tcs_01M5KGPHHA95B0BV7YB162MXF8","modified_at":"2026-07-13T07:15:44.064352714Z","published_at":"2025-12-12T06:15:41.380Z","references":["https://osv.dev/vulnerability/PYSEC-2025-266","https://github.com/tornadoweb/tornado/releases/tag/v6.5.3","https://github.com/tornadoweb/tornado/security/advisories/GHSA-c98p-7wgm-6p64","https://github.com/tornadoweb/tornado/commit/771472cfdaeebc0d89a9cc46e249f8891a6b29cd"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2025-266","url":"https://osv.dev/vulnerability/PYSEC-2025-266"}],"summary":"Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, a single maliciously crafted HTTP request can block the server's event loop for an extended period,"}