Denial of Service Vulnerability in MySQL Server and Cluster by Oracle
CVE-2026-101784

4.9MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Mysql Cluster
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101784?

A vulnerability exists in Oracle's MySQL Server and MySQL Cluster products that allows attackers with high privileges and network access to potentially cause a denial of service. This vulnerability can lead to an unauthorized ability to hang or crash the MySQL services, severely impacting availability for users. Supported versions affected include multiple iterations of MySQL Server and Cluster, making it critical for users to update their software in order to mitigate risks.

Affected Version(s)

MySQL Cluster 8.0.0-8.0.49

MySQL Cluster 8.4.0-8.4.12

MySQL Cluster 9.7.0-9.7.3

References

https://www.oracle.com/security-alerts/cpuoct2026.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

.