{"action":"Upgrade tornado to 6.5.3 or later.","affected":[{"fixed":"6.5.3","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2025-67724"],"ecosystem":"PyPI","epss":0.0024,"exploited":false,"fixed_versions":["6.5.3"],"ghsa_id":"GHSA-pr2v-jx2c-wg9f","id":"tcs_01M5KGPHC9K1ST421BV0SD12K9","modified_at":"2026-07-13T07:15:44.068555841Z","published_at":"2025-12-12T06:15:41.213Z","references":["https://osv.dev/vulnerability/PYSEC-2025-265","https://github.com/tornadoweb/tornado/releases/tag/v6.5.3","https://github.com/tornadoweb/tornado/security/advisories/GHSA-pr2v-jx2c-wg9f","https://github.com/tornadoweb/tornado/commit/9c163aebeaad9e6e7d28bac1f33580eb00b0e421"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"PYSEC-2025-265","url":"https://osv.dev/vulnerability/PYSEC-2025-265"}],"summary":"Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header inje"}