{"id":"UBUNTU-CVE-2026-38968","details":"ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.","modified":"2026-07-09T15:18:06Z","published":"2026-07-02T21:16:00Z","upstream":["CVE-2026-38968"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-38968"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-38968"},{"type":"REPORT","url":"https://github.com/ntop/ntopng/commit/14e22497233dc7d31d19dccb74b13bb073d16c2c"},{"type":"REPORT","url":"https://github.com/ntop/ntopng/commit/179a346ceb6239fd36128ccca3efa8f9ea61eeb5"}],"affected":[{"package":{"name":"ntopng","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1+dfsg1-2ubuntu1","2.0+dfsg1-1","2.2+dfsg1-1","2.2+dfsg1-1build1","2.2+dfsg1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ntopng","binary_version":"2.2+dfsg1-1ubuntu0.1~esm2"},{"binary_name":"ntopng-data","binary_version":"2.2+dfsg1-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4+dfsg1-3","2.4+dfsg1-4","3.2+dfsg1-1","3.2+dfsg1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ntopng","binary_version":"3.2+dfsg1-1ubuntu0.1~esm2"},{"binary_name":"ntopng-data","binary_version":"3.2+dfsg1-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8+dfsg1-2.1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"ntopng","binary_version":"3.8+dfsg1-2.1build3"},{"binary_version":"3.8+dfsg1-2.1build3","binary_name":"ntopng-data"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1+dfsg1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ntopng","binary_version":"5.2.1+dfsg1-1"},{"binary_name":"ntopng-data","binary_version":"5.2.1+dfsg1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1+dfsg1-1","5.2.1+dfsg1-1ubuntu1","5.2.1+dfsg1-1ubuntu3","5.2.1+dfsg1-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.1+dfsg1-1ubuntu4","binary_name":"ntopng"},{"binary_version":"5.2.1+dfsg1-1ubuntu4","binary_name":"ntopng-data"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1+dfsg1-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.1+dfsg1-2ubuntu1","binary_name":"ntopng"},{"binary_name":"ntopng-data","binary_version":"5.2.1+dfsg1-2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-38968.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}