{"action":"Upgrade tornado to 6.5.6 or later.","affected":[{"fixed":"6.5.6","introduced":"0"}],"component":"tornado","cve_ids":["CVE-2026-49855"],"ecosystem":"PyPI","epss":0.00572,"exploited":false,"fixed_versions":["6.5.6"],"ghsa_id":"GHSA-mgf9-4vpg-hj56","id":"tcs_01M5KFR1JJWTKJFMJBGNG05911","modified_at":"2026-09-10T03:51:09.080081033Z","published_at":"2026-06-15T20:19:28Z","references":["https://osv.dev/vulnerability/GHSA-mgf9-4vpg-hj56","https://github.com/tornadoweb/tornado/security/advisories/GHSA-mgf9-4vpg-hj56","https://github.com/tornadoweb/tornado"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-mgf9-4vpg-hj56","url":"https://osv.dev/vulnerability/GHSA-mgf9-4vpg-hj56"}],"summary":"tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)"}