Denial-of-Service Vulnerability in Oracle MySQL Server
CVE-2026-34272

6.5MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
21 April 2026

What is CVE-2026-34272?

A vulnerability exists in Oracle's MySQL Server, specifically within the Server: Optimizer component. This flaw allows an attacker with low privileges to exploit the system through multiple network protocols. The exploitation can lead to significant disruptions, causing the MySQL Server to hang or crash repeatedly, ultimately resulting in a denial-of-service condition. It is crucial for users of affected versions (9.0.0 to 9.6.0) to take immediate action to secure their databases.

Affected Version(s)

MySQL Server 9.0.0 <= 9.6.0

References

https://www.oracle.com/security-alerts/cpuapr2026.html
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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