Denial of Service Vulnerability in Oracle MySQL Server
CVE-2026-21968

6.5MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21968?

A vulnerability exists in Oracle MySQL Server that can be exploited by a low-privileged attacker with network access. This issue allows attackers to potentially cause the MySQL Server to crash or become unresponsive, thereby resulting in a denial of service. Affected versions include MySQL Server 8.0.0 through 8.0.44, as well as specific ranges in versions 8.4 and 9.0. Organizations using these versions should take proactive measures to mitigate this security risk.

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Affected Version(s)

MySQL Server 8.0.0 <= 8.0.44

MySQL Server 8.4.0 <= 8.4.7

MySQL Server 9.0.0 <= 9.5.0

References

https://www.oracle.com/security-alerts/cpujan2026.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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