CVE-2026-34267

MEDIUM

Oracle Corporation MySQL Server < 8.0.45 - Denial of Service

Title source: rule

Description

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).

References (1)

[Vendor Advisory] https://www.oracle.com/security-alerts/cpuapr2026.html

Scores

CVSS v3 4.9

EPSS 0.0004

EPSS Percentile 13.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (2)

oracle/mysql_server 8.0.0 - 8.0.45

Oracle Corporation/MySQL Server 8.0.0 - 8.0.45

Published Apr 21, 2026

Tracked Since Apr 22, 2026