{"id":"UBUNTU-CVE-2026-78323","details":"A flaw was found in JSS (Java Security Services). The JSSTrustManager class does not verify NSS trust flags when validating CA certificates, allowing certificates present in the NSS database without TRUSTED_CA flags to be accepted as trust anchors for TLS connections. In non-default configurations where certificate revocation checking is disabled, this could allow a man-in-the-middle attacker to forge certificates accepted by PKI client connections.","modified":"2026-09-02T19:36:46.912537110Z","published":"2026-08-24T12:16:00Z","upstream":["CVE-2026-78323"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-78323"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-78323"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521775"}],"affected":[{"package":{"name":"jss","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-6"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.1-6","binary_name":"libjss-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.json"}},{"package":{"name":"jss","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-1","4.4.2-2","4.4.2-3","4.4.2-6","4.4.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjss-java","binary_version":"4.4.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.json"}},{"package":{"name":"jss","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6.1-3","4.6.2-1","4.6.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjss-java","binary_version":"4.6.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.json"}},{"package":{"name":"jss","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-2","5.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.0.0-1","binary_name":"libjss-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.json"}},{"package":{"name":"jss","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.2-1","5.5.0-1","5.5.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjss-java","binary_version":"5.5.0-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.json"}},{"package":{"name":"jss","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/jss?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.5.0-1build1","5.9.0~beta3-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.9.0~beta3-3ubuntu1","binary_name":"libjss-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78323.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:H/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}