CVE-2026-21949

Name of the Vulnerable Software and Affected Versions Oracle MySQL versions 9.0.0 through 9.5.0

Description An issue exists in the MySQL Server component, specifically within the Optimizer. A low-privileged attacker with network access through multiple protocols can cause a denial-of-service condition, leading to a hang or frequent crashes of the MySQL Server.

Recommendations Update to a version beyond 9.5.0. At the moment, there is no information about a newer version that contains a fix for this vulnerability.