{"schemaVersion":3,"id":"USN-8937-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"openssh, openssh-gssapi vulnerabilities\n\nIt was discovered that OpenSSH's sftp client incorrectly handled paths\nreturned by the server during a recursive copy operation. A remote attacker\ncontrolling the server could possibly use this issue to write files to\nunintended locations. (CVE-2026-106552)\n\nIt was discovered that OpenSSH's sshd server incorrectly handled\nGSSAPIAuthentication state across authentication attempts. An attacker\ncould possibly use this issue to obtain credentials from a previous failed\nauthentication attempt. (CVE-2026-106553, CVE-2026-106555)\n\nIt was discovered that OpenSSH incorrectly used an LZ77 dictionary coder\nduring compression. An attacker could possibly use this issue to obtain\nsensitive information. (CVE-2026-106582)\n\nIt was discovered that OpenSSH's ssh client incorrectly allowed special\ncharacters in command-line usernames. An attacker could possibly use this\nissue to inject arbitrary commands via specially crafted usernames.\n(CVE-2026-106583)\n\nIt was discovered that OpenSSH's ssh-keygen incorrectly handled Daylight\nSaving Time when converting dates. An attacker could possibly use this\nissue to cause certificates to have incorrect expiration times.\n(CVE-2026-106584)\n\nIt was discovered that OpenSSH did not check whether the maximum packet\nlength was exceeded during decompression. A remote attacker could possibly\nuse this issue to cause a denial of service. (CVE-2026-106585)\n\nIt was discovered that OpenSSH's sshd server incorrectly applied the\nrestrict keyword from authorized_keys to tunnel forwarding requests. A\nlocal attacker with an authorized key could possibly use this issue to\nbypass intended tunnel forwarding restrictions. (CVE-2026-106586)\n\nIt was discovered that OpenSSH's sshd server incorrectly handled certain\nconfiguration options that accept a \"none\" value. An attacker could\npossibly use this issue to cause OpenSSH to behave unexpectedly.\n(CVE-2026-106587)","dates":{"published":"2026-10-19T13:34:39.000Z","modified":"2026-10-19T23:43:21.200Z","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":"openssh","name":"openssh","label":"openssh","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssh","purlType":"deb","versions":[{"text":"< 1:10.5p1-1ubuntu3.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:10.5p1-1ubuntu3.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"openssh-gssapi","name":"openssh-gssapi","label":"openssh-gssapi","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssh-gssapi","purlType":"deb","versions":[{"text":"< 1:10.5p1-1ubuntu3.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:10.5p1-1ubuntu3.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8937-1","label":"ubuntu.com/security/notices/USN-8937-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-106552","label":"ubuntu.com/security/CVE-2026-106552","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106553","label":"ubuntu.com/security/CVE-2026-106553","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106555","label":"ubuntu.com/security/CVE-2026-106555","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106582","label":"ubuntu.com/security/CVE-2026-106582","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106583","label":"ubuntu.com/security/CVE-2026-106583","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106584","label":"ubuntu.com/security/CVE-2026-106584","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106585","label":"ubuntu.com/security/CVE-2026-106585","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106586","label":"ubuntu.com/security/CVE-2026-106586","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-106587","label":"ubuntu.com/security/CVE-2026-106587","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-106552","CVE-2026-106553","CVE-2026-106555","CVE-2026-106582","CVE-2026-106583","CVE-2026-106584","CVE-2026-106585","CVE-2026-106586","CVE-2026-106587"],"downstream":[],"duplicates":[],"related":["CVE-2026-106552","CVE-2026-106553","CVE-2026-106555","CVE-2026-106582","CVE-2026-106583","CVE-2026-106584","CVE-2026-106585","CVE-2026-106586","CVE-2026-106587"]},"timeline":[{"kind":"published","date":"2026-10-19T13:34:39.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-19T23:43:21.200Z","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":"2026-10-21T01:30:26.669Z","stale":false,"partial":false}}