MySQL Server Vulnerability in Oracle MySQL Product
CVE-2026-21929

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21929?

A vulnerability has been identified in Oracle's MySQL Server that could be exploited by a low privileged attacker with network access through various protocols. This flaw has the potential to allow unauthorized users to cause MySQL Server to hang or crash repeatedly, leading to a denial of service. Affected versions range from 9.0.0 to 9.5.0, making it crucial for organizations utilizing these versions to update and mitigate risks associated with this vulnerability.

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Affected Version(s)

MySQL Server 9.0.0 <= 9.5.0

References

https://www.oracle.com/security-alerts/cpujan2026.html
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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