CVE-2026-101749 Oracle Corporation CVE debrief

Who should care

Database administrators, security teams, and IT professionals responsible for MySQL Server and MySQL Cluster deployments should assess exposure and prioritize remediation. This includes reviewing and applying vendor advisories, assessing the potential impact on database-dependent services and applications, and verifying affected versions and exposure.

Why it matters

CVE-2026-101749 is a medium-severity vulnerability in MySQL Server and MySQL Cluster that allows high-privileged attackers to cause a denial of service. Database administrators and security teams should assess exposure and prioritize remediation.

• Denial of service (complete DOS) of MySQL Server and MySQL Cluster
• Potential disruption to database-dependent services and applications
• Need for verification of affected versions and exposure
• Priority for remediation and patching

Technical summary

The vulnerability is in the Server: Security: Encryption component of MySQL Server and MySQL Cluster. It has a CVSS score of 4.9 and can be exploited by high-privileged attackers with network access via multiple protocols to cause a denial of service (complete DOS). The vulnerability affects MySQL Server: 26.7.0-26.7.1; MySQL Cluster: 26.7.0-26.7.1. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the vendor advisory from Oracle
• Assess exposure and prioritize remediation for MySQL Server and MySQL Cluster versions 26.7.0-26.7.1
• Monitor for potential denial of service attacks
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, including its description, affected versions, and CVSS score. The vulnerability has a CVSS score of 4.9 and can be exploited by high-privileged attackers with network access via multiple protocols to cause a denial of service (complete DOS). The official CVE Program record and NIST NVD detail page offer source-provided CVE metadata and source-specific vulnerability assessment.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.