{"schemaVersion":3,"id":"USN-8722-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libssh2 vulnerabilities\n\nIt was discovered that libssh2 incorrectly handled certain SFTP server\nresponses. A remote attacker controlling an SSH server could use this issue\nto cause libssh2 to crash or possibly execute arbitrary code.\n(CVE-2026-66032)\n\nIt was discovered that libssh2 incorrectly handled AES-GCM cipher\nnegotiation. A remote attacker controlling an SSH server could possibly use\nthis issue to cause libssh2 to crash, resulting in a denial of service.\n(CVE-2026-66033)\n\nIt was discovered that libssh2 incorrectly handled Encrypt-then-MAC cipher\nnegotiation. A remote attacker controlling an SSH server could use this\nissue to cause libssh2 to crash or possibly execute arbitrary code.\n(CVE-2026-66035)","dates":{"published":"2026-09-03T12:37:05.000Z","modified":"2026-09-03T22:56:55.638Z","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":"libssh2","name":"libssh2","label":"libssh2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libssh2","purlType":"deb","versions":[{"text":"< 1.11.0-4.1ubuntu0.24.04.4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.11.1-1ubuntu0.26.04.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.11.0-4.1ubuntu0.24.04.4 | < 1.11.1-1ubuntu0.26.04.4","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8722-1","label":"ubuntu.com/security/notices/USN-8722-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-66032","label":"ubuntu.com/security/CVE-2026-66032","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-66033","label":"ubuntu.com/security/CVE-2026-66033","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-66035","label":"ubuntu.com/security/CVE-2026-66035","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-66032","CVE-2026-66033","CVE-2026-66035"],"downstream":[],"duplicates":[],"related":["CVE-2026-66032","CVE-2026-66033","CVE-2026-66035"]},"timeline":[{"kind":"published","date":"2026-09-03T12:37:05.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-03T22:56:55.638Z","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":"2026-10-20T05:54:51.962Z","stale":false,"partial":false}}