A Session Fixation issue exists in CodeIgniter before 3.1.9 because session.usestrictmode in the Session Library was mishandled.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12071.json"
[ { "events": [ { "introduced": "0" }, { "fixed": "3.1.9" } ] }, { "events": [ { "introduced": "0" }, { "fixed": "3.1.9" } ] } ]