Denial of Service Vulnerability in MySQL Server and MySQL Cluster by Oracle
CVE-2026-101780

6.5MEDIUM

Key Information:

Vendor

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

What is CVE-2026-101780?

A vulnerability has been identified in Oracle's MySQL Server and MySQL Cluster products, particularly affecting the Server: X Plugin component. This vulnerability allows low-privileged attackers with network access via multiple protocols to disrupt the normal operation of the database servers. Exploiting this flaw can lead to frequent crashes or hangs, effectively resulting in a denial of service condition. Systems running affected versions of MySQL Server (8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1) and MySQL Cluster (8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1) are at risk. Immediate patching or workarounds should be implemented to mitigate potential impacts.

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

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