Oracle · Mysql 8.4 · CVE-2026-21948
**Name of the Vulnerable Software and Affected Versions**
Oracle MySQL versions 8.0.0 through 8.0.44
Oracle MySQL versions 8.4.0 through 8.4.7
Oracle MySQL versions 9.0.0 through 9.5.0
**Description**
A flaw exists in the Optimizer component of the MySQL Server product. A highly privileged attacker with network access through multiple protocols can exploit this issue to cause a denial-of-service condition, leading to hangs or frequent crashes of the MySQL Server.
**Recommendations**
Update Oracle MySQL to a version later than 8.0.44.
Update Oracle MySQL to a version later than 8.4.7.
Update Oracle MySQL to a version later than 9.5.0.