Denial of Service Vulnerability in MySQL Server and MySQL Cluster by Oracle
CVE-2026-101788

5.9MEDIUM

Key Information:

Vendor

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

What is CVE-2026-101788?

This vulnerability in Oracle's MySQL Server and MySQL Cluster components allows an unauthenticated attacker with network access to exploit multiple protocols. Successful exploitation can lead to frequent and potentially complete crashes or hangs of the affected MySQL systems, severely impacting availability.

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:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.