CVE-2026-34303MediumCVSS 6.5

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. 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).

Published
June 2, 2026
Last Modified
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🔗 CVE IDs covered (1)

CVE-2026-34303 →

🎯 Affected products3

  • azl3 mysql 8.0.45-2 on Azure Linux 3.0
  • cbl2 mysql 8.0.45-3 on CBL Mariner 2.0
  • cbl2 mysql 8.0.45-3 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 8.0.46-1 KBRelease Notes (Security Update) — fixed build 8.0.46-1

🔗 References (2)