{"schemaVersion":3,"id":"USN-8198-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"python-tornado vulnerabilities\n\nIt was discovered that Tornado incorrectly handled parsing of large\nmultipart request bodies. An attacker could possibly use this issue to\ncause a denial of service. (CVE-2026-31958)\n\nIt was discovered that Tornado did not properly validate characters in\ncookie values. An attacker could possibly use this issue to inject\narbitrary cookie attributes. (CVE-2026-35536)","dates":{"published":"2026-04-22T17:52:30.000Z","modified":"2026-06-25T13:32:32.079Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"python-tornado","name":"python-tornado","label":"python-tornado","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/python-tornado","purlType":"deb","versions":[{"text":"< 4.2.1-1ubuntu3.1+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 4.5.3-1ubuntu0.2+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 6.0.3+really5.1.1-3ubuntu0.1~esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 6.1.0-3ubuntu0.1~esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 6.4.0-1ubuntu0.5","noFixRecorded":false,"fixedIn":null},{"text":"< 6.4.2-3ubuntu0.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.2.1-1ubuntu3.1+esm3 | < 4.5.3-1ubuntu0.2+esm3 | < 6.0.3+really5.1.1-3ubuntu0.1~esm5 | < 6.1.0-3ubuntu0.1~esm5 | < 6.4.0-1ubuntu0.5 | < 6.4.2-3ubuntu0.3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8198-1","label":"ubuntu.com/security/notices/USN-8198-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-31958","label":"ubuntu.com/security/CVE-2026-31958","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-35536","label":"ubuntu.com/security/CVE-2026-35536","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-31958","CVE-2026-35536"]},"timeline":[{"kind":"published","date":"2026-04-22T17:52:30.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:32:32.079Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:29:28.476Z","stale":false,"partial":false}}