CVE-2019-2803: Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Optimizer).

Security readout for executives and security teams

CVE-2019-2803 is a MySQL Server availability flaw in the Optimizer component. An already high-privileged attacker with network access could cause MySQL Server to hang or crash repeatedly, creating a complete denial of service. The cited scope is MySQL Server 8.0.16 and prior. Exposure is most relevant where MySQL Server 8.0.16 or earlier is reachable by privileged database users over supported network protocols. Internet exposure increases operational risk, but the supplied evidence still requires high privileges before exploitation. Treat as a service-availability risk, not a confidentiality breach based on supplied evidence. Prioritize remediation on production databases, externally reachable management networks, and environments where many users or applications hold high MySQL privileges. Mitigation focus: Apply Oracle July 2019 CPU or later MySQL Server updates.; Upgrade MySQL Server instances beyond affected 8.0.16 and prior versions.; Restrict MySQL network access to trusted administrative paths only..

Prepared

Jun 6, 2026, 20:22 UTC (UTC+00:00)

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