{"id":"UBUNTU-CVE-2026-8367","details":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","modified":"2026-08-21T10:00:11.578036579Z","published":"2026-05-13T16:17:00Z","upstream":["CVE-2026-8367"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-8367"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-8367"},{"type":"REPORT","url":"https://github.com/aria2/aria2/issues/2355"},{"type":"REPORT","url":"https://www.tenable.com/security/research/tra-2026-38"}],"affected":[{"package":{"name":"aria2","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17.0-1","1.18.0-1","1.18.0-1ubuntu2","1.18.0-2","1.18.1-1","1.18.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.18.1-1ubuntu0.1~esm1","binary_name":"aria2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19.0-1","1.19.0-1build1","1.19.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"aria2","binary_version":"1.19.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.32.0-1","1.32.0-2","1.33.1-1","1.33.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"aria2","binary_version":"1.33.1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.34.0-4","1.35.0-1","1.35.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"aria2","binary_version":"1.35.0-1build1"},{"binary_name":"libaria2-0","binary_version":"1.35.0-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.35.0-3","1.36.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.36.0-1","binary_name":"aria2"},{"binary_name":"libaria2-0","binary_version":"1.36.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.36.0-2","1.37.0+debian-1","1.37.0+debian-1build1","1.37.0+debian-1build2","1.37.0+debian-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"aria2","binary_version":"1.37.0+debian-1build3"},{"binary_version":"1.37.0+debian-1build3","binary_name":"libaria2-0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.37.0+debian-3","1.37.0+debian-3build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.37.0+debian-3build1","binary_name":"aria2"},{"binary_name":"libaria2-0","binary_version":"1.37.0+debian-3build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}},{"package":{"name":"aria2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/aria2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.37.0+debian-3build1","1.37.0+debian-4"],"ecosystem_specific":{"binaries":[{"binary_name":"aria2","binary_version":"1.37.0+debian-4"},{"binary_name":"libaria2-0","binary_version":"1.37.0+debian-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8367.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}