Oracle MySQL Server Pluggable Authentication Vulnerability Allowing Partial Denial-of-Service

Vulnerability

A vulnerability has been identified in Oracle MySQL Server versions 9.0.0 through 9.5.0, specifically within the Pluggable Authentication component. This easily exploitable vulnerability allows a high-privileged attacker with network access to MySQL Server via multiple protocols to cause a partial denial-of-service. The issue arises in the authentication process, where improper handling can lead to service disruptions.

Impact

Exploitation of this vulnerability can cause a partial denial-of-service on the MySQL Server, disrupting normal operations but not completely shutting down the service.

Added: Jan 20, 2026, 10:52 PM
Updated: Jan 20, 2026, 10:52 PM

Vulnerability Rating

Custom Algorithm
spread
8.7
impact
0.6
exploitability
4.4
remediation
0.0
relevance
2.1
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.