{"id":"USN-8532-1","summary":"libssh2 vulnerabilities","details":"It was discovered that libssh2 incorrectly handled certain publickey\nsubsystem attributes. A remote attacker controlling a malicious SSH server\ncould use this issue to cause a denial of service or possibly execute\narbitrary code. (CVE-2026-58050)\n\nIt was discovered that libssh2 did not properly initialize publickey list\nentries before parsing. A remote attacker controlling a malicious SSH\nserver could use this issue to cause a denial of service or possibly\nexecute arbitrary code. (CVE-2026-58051)","modified":"2026-07-13T20:44:41.330794548Z","published":"2026-07-13T12:46:47Z","related":["UBUNTU-CVE-2026-58050","UBUNTU-CVE-2026-58051"],"upstream":["CVE-2026-58050","CVE-2026-58051","UBUNTU-CVE-2026-58050","UBUNTU-CVE-2026-58051"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8532-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-58050"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-58051"}],"affected":[{"package":{"name":"libssh2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libssh2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0-4.1ubuntu0.24.04.3"}]}],"versions":["1.11.0-2","1.11.0-3","1.11.0-4","1.11.0-4.1build1","1.11.0-4.1build2","1.11.0-4.1ubuntu0.24.04.1","1.11.0-4.1ubuntu0.24.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.11.0-4.1ubuntu0.24.04.3","binary_name":"libssh2-1t64"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-58050","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-58051","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8532-1.json"}},{"package":{"name":"libssh2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libssh2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.1-1ubuntu0.26.04.3"}]}],"versions":["1.11.1-1build1","1.11.1-1build2","1.11.1-1ubuntu0.26.04.1","1.11.1-1ubuntu0.26.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"libssh2-1t64","binary_version":"1.11.1-1ubuntu0.26.04.3"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-58050","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-58051"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8532-1.json"}}],"schema_version":"1.7.5"}