CVE-2015-8838: ext/mysqlnd/mysqlnd.c in PHP before 5.4.43, 5.5.x before 5.5.27, and 5.6.x before 5.6.11 uses a client SSL...

Security readout for executives and security teams

CVE-2015-8838 affects PHP's mysqlnd client behavior. In affected PHP versions, an SSL option could be treated as optional, so a network attacker positioned between the application and database could downgrade the connection to cleartext and spoof the server. Exposure is most likely in legacy PHP 5.4, 5.5, or 5.6 applications using mysqlnd for MySQL connections where SSL was expected to protect traffic across an untrusted or shared network. Treat this as a legacy-platform risk. It is not marked as actively exploited, but it can undermine database transport encryption where old PHP versions remain in production. Mitigation focus: Upgrade PHP to 5.4.43, 5.5.27, 5.6.11, or a supported later release.; Apply relevant Ubuntu or SUSE security updates if using distribution PHP packages.; Prioritize systems where application-to-database traffic crosses shared, hosted, or untrusted networks..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.