Denial of Service Vulnerability in MySQL Server and MySQL Cluster by Oracle
CVE-2026-101778

6.5MEDIUM

Key Information:

Vendor

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

What is CVE-2026-101778?

A vulnerability exists in the MySQL Server and MySQL Cluster products from Oracle that allows low-privileged attackers with network access to exploit the system via multiple protocols. This easily exploitable bug can lead to unauthorized access resulting in the potential for the MySQL Server or MySQL Cluster to hang or crash repeatedly, causing a Denial of Service. Organizations utilizing affected versions should apply the necessary patches to mitigate the risk of disruption to their database services.

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:
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

.