Denial of Service Vulnerability in MySQL Server by Oracle
CVE-2026-21937

4.9MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21937?

A vulnerability exists in Oracle's MySQL Server component that could be easily exploited by a high privileged attacker with network access through various protocols. This flaw permits unauthorized individuals to execute commands that may lead to the MySQL Server hanging or undergoing frequent crashes, effectively resulting in service disruption. The impacted versions include 8.0.0 through 8.0.44, 8.4.0 through 8.4.7, and 9.0.0 through 9.5.0, emphasizing the importance of immediate action to safeguard database integrity.

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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:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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