{"schemaVersion":3,"id":"USN-8190-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"ruby-rack-session vulnerability\n\nUSN-8190-1 fixed a vulnerability in Rack::Session. This update provides the\ncorresponding update for Ubuntu 26.04 LTS.\n\nOriginal advisory details:\n\n SeungMyung Lee discovered that Rack::Session did not properly reject\n cookies upon decryption failure. A remote attacker could use this issue to\n manipulate session contents and possibly gain unauthorized access.","dates":{"published":"2026-04-28T13:51:40.000Z","modified":"2026-05-20T16:03:58.929Z","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":"ruby-rack-session","name":"ruby-rack-session","label":"ruby-rack-session","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/ruby-rack-session","purlType":"deb","versions":[{"text":"< 2.1.1-0.1ubuntu0.26.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.1.1-0.1ubuntu0.26.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8190-2","label":"ubuntu.com/security/notices/USN-8190-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-39324","label":"ubuntu.com/security/CVE-2026-39324","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-39324"]},"timeline":[{"kind":"published","date":"2026-04-28T13:51:40.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-20T16:03:58.929Z","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":"2026-10-21T14:58:36.000Z","stale":false,"partial":false}}