CVE-2026-34267: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45. Easily exploitable vulnerability allows high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 8.0.46-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34267?
CVE-2026-34267 is considered a high severity vulnerability due to its potential to allow high privileged attackers to compromise MySQL Server.
How do I fix CVE-2026-34267?
To fix CVE-2026-34267, update your MySQL Server to a version higher than 8.0.45.
Who is affected by CVE-2026-34267?
CVE-2026-34267 affects users of Oracle MySQL Server versions 8.0.0 to 8.0.45.
What part of MySQL Server is vulnerable in CVE-2026-34267?
CVE-2026-34267 affects the Optimizer component of the MySQL Server.
What is the impact of an attack exploiting CVE-2026-34267?
An attack exploiting CVE-2026-34267 can lead to unauthorized access and potential manipulation of the MySQL Server.