CVE-2026-21998

Oracle MySQL Server (Server: Optimizer) is affected. Affected versions: 8.0.0–8.0.45, 8.4.0–8.4.8, and 9.0.0–9.6.0. The vulnerability allows a high-privileged attacker with network access via multiple protocols to cause a hang or crash (DoS). CVSS 3.1 base score is 4.9 (Availability impact). Expl...