{"schemaVersion":3,"id":"USN-8398-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"nginx regression\n\nUSN-8398-1 fixed a vulnerability in nginx. The update introduced a\nregression causing nginx to crash when being used with external modules.\nThis update reverts the fix for CVE-2026-49975 pending further\ninvestigation.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that nginx incorrectly handled certain cookie headers in\n the HTTP/2 implementation. A remote attacker could possibly use this issue\n to cause nginx to consume excessive resources, resulting in a denial of\n service.","dates":{"published":"2026-06-09T13:48:05.000Z","modified":"2026-06-09T21:15:20.239Z","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":"nginx","name":"nginx","label":"nginx","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/nginx","purlType":"deb","versions":[{"text":"< 1.18.0-6ubuntu14.14","noFixRecorded":false,"fixedIn":null},{"text":"< 1.24.0-2ubuntu7.11","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.0-6ubuntu1.6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.3-2ubuntu1.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.18.0-6ubuntu14.14 | < 1.24.0-2ubuntu7.11 | < 1.28.0-6ubuntu1.6 | < 1.28.3-2ubuntu1.4","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8398-2","label":"ubuntu.com/security/notices/USN-8398-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://launchpad.net/bugs/2155992","label":"launchpad.net/bugs/2155992","hostname":"launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-49975"]},"timeline":[{"kind":"published","date":"2026-06-09T13:48:05.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-09T21:15:20.239Z","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":"2026-10-19T12:09:14.647Z","stale":false,"partial":false}}