CVE-2026-21950: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.0.0-9.5.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-21950?
CVE-2026-21950 is an easily exploitable vulnerability that allows low privileged attackers to compromise MySQL Server.
How do I fix CVE-2026-21950?
To fix CVE-2026-21950, update your MySQL Server to a version higher than 9.5.0.
Who is affected by CVE-2026-21950?
CVE-2026-21950 affects users of Oracle MySQL Server versions 9.0.0 to 9.5.0.
What attack vectors are involved in CVE-2026-21950?
CVE-2026-21950 can be exploited via multiple network protocols, allowing low privileged attackers to target MySQL Server.
What components of MySQL Server are impacted by CVE-2026-21950?
CVE-2026-21950 specifically impacts the optimizer component of MySQL Server.