{"schemaVersion":3,"id":"CVE-2026-35386","aliases":["UBUNTU-CVE-2026-35386","DEBIAN-CVE-2026-35386"],"status":"published","duplicateOf":null,"title":null,"description":"In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.","dates":{"published":"2026-04-02T16:44:27.806Z","modified":"2026-04-03T03:55:45.599Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.6,"severity":"low","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00356,"percentile":0.27831,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.036999999999999963,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00319},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00356,"percentile":0.27831}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00356,"percentile":0.27831}]},"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":[{"id":"CWE-696","name":"Incorrect Behavior Order","description":"The product performs multiple related behaviors, but the behaviors are performed in the wrong order in ways that may produce resultant weaknesses.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/696.html"}],"affected":[{"vendor":"debian","product":"openssh","name":"openssh","label":"openssh","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/openssh","purlType":"deb","versions":[{"text":"< 1:9.2p1-2+deb12u10","noFixRecorded":false,"fixedIn":null},{"text":"< 1:10.0p1-7+deb13u3","noFixRecorded":false,"fixedIn":null},{"text":"< 1:10.3p1-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:9.2p1-2+deb12u10 | < 1:10.0p1-7+deb13u3 | < 1:10.3p1-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"openssh","name":"openssh","label":"openssh","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssh","purlType":"deb","versions":[{"text":"< 1:6.6p1-2ubuntu2.13+esm4","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1:8.9p1-3ubuntu0.15","noFixRecorded":false,"fixedIn":null},{"text":"< 1:8.9p1-3ubuntu0.15+Fips1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.6p1-3ubuntu13.16","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.6p1-3ubuntu13.16+Fips1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:10.0p1-5ubuntu5.4","noFixRecorded":false,"fixedIn":null},{"text":"< 1:10.2p1-2ubuntu3.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:6.6p1-2ubuntu2.13+esm4 | All versions (No fix recorded) | < 1:8.9p1-3ubuntu0.15 | < 1:8.9p1-3ubuntu0.15+Fips1 | < 1:9.6p1-3ubuntu13.16 | < 1:9.6p1-3ubuntu13.16+Fips1 | < 1:10.0p1-5ubuntu5.4 | < 1:10.2p1-2ubuntu3.2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"openssh-ssh1","name":"openssh-ssh1","label":"openssh-ssh1","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssh-ssh1","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"openbsd","product":"openssh","name":"openssh","label":"openssh","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 10.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0, < 10.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.3 | ≥ 10.0, < 10.3","eol":null,"hubHref":"/vendor/openbsd/openssh"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.openssh.org/releasenotes.html#10.3p1","label":"www.openssh.org/releasenotes.html","hostname":"www.openssh.org","tags":["REPORT","Release Notes"]},{"url":"https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2","label":"marc.info?l=openssh-unix-dev&m=177513443901484&w=2","hostname":"marc.info","tags":["Third Party Advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2026/04/02/3","label":"www.openwall.com/lists/oss-security/2026/04/02/3","hostname":"www.openwall.com","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-35386","label":"ubuntu.com/security/CVE-2026-35386","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-35386","label":"www.cve.org/CVERecord?id=CVE-2026-35386","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8222-1","label":"ubuntu.com/security/notices/USN-8222-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8804-1","label":"ubuntu.com/security/notices/USN-8804-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-35386","label":"security-tracker.debian.org/tracker/CVE-2026-35386","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35386","label":"nvd.nist.gov/vuln/detail/CVE-2026-35386","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0193","RHSA-2026:12389","RHSA-2026:13380","RHSA-2026:13381","RHSA-2026:13383","RHSA-2026:16059","RHSA-2026:19069","RHSA-2026:19219","RHSA-2026:21298","RHSA-2026:21398","RHSA-2026:22329","RHSA-2026:22564","RHSA-2026:22648","USN-8804-1"],"duplicates":[],"related":["USN-8222-1","USN-8804-1"]},"timeline":[{"kind":"published","date":"2026-04-02T16:44:27.806Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-03T03:55:45.599Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":32,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:31:13.432Z","stale":false,"partial":false}}