{"action":"Upgrade tornado to 6.5.6 or later.","affected":[{"fixed":"6.5.6","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2026-49854"],"ecosystem":"PyPI","epss":0.00419,"exploited":false,"fixed_versions":["6.5.6"],"ghsa_id":"GHSA-cx3h-4qpv-8hc9","id":"tcs_01M5KH5222WFMFTJJ1ED220B25","modified_at":"2026-07-13T16:33:26.790475442Z","published_at":"2026-07-13T15:46:17.044501Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3388","https://github.com/tornadoweb/tornado/security/advisories/GHSA-cx3h-4qpv-8hc9","https://github.com/tornadoweb/tornado","https://github.com/tornadoweb/tornado/releases/tag/v6.5.6","https://pypi.org/project/tornado","https://github.com/advisories/GHSA-cx3h-4qpv-8hc9","https://nvd.nist.gov/vuln/detail/CVE-2026-49854"],"severity":{"label":"low","score":3.7},"sources":[{"source":"osv","source_id":"PYSEC-2026-3388","url":"https://osv.dev/vulnerability/PYSEC-2026-3388"}],"summary":"Tornado has out-of-bounds memory access via C extension"}