Oracle MySQL Server Denial-of-Service Vulnerability in the Optimizer Component

Vulnerability

A denial-of-service vulnerability has been identified in the MySQL Server product of Oracle MySQL, specifically within the Optimizer component. This issue affects MySQL versions 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0. The vulnerability is easily exploitable, allowing a high-privileged attacker with network access to MySQL Server via multiple protocols to cause a hang or a frequently repeatable crash, leading to a complete denial-of-service condition on the server.

Impact

Exploitation of this vulnerability can cause MySQL Server to hang or crash, leading to a complete denial-of-service condition.

Added: Apr 21, 2026, 11:35 PM
Updated: Apr 21, 2026, 11:35 PM

Vulnerability Rating

Custom Algorithm
spread
8.7
impact
2.5
exploitability
4.4
remediation
0.0
relevance
6.4
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.