CVE-2026-101733 Oracle Corporation CVE debrief

Who should care

MySQL Server and MySQL Cluster administrators, DBAs, and security teams responsible for ensuring the availability and security of these systems. They should assess exposure, apply patches, and monitor for potential attacks. MySQL Server and MySQL Cluster administrators should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-101733 is a medium-severity vulnerability in MySQL Server and MySQL Cluster that allows low-privileged attackers to cause a DOS. MySQL Server and MySQL Cluster administrators should assess exposure, apply patches, and monitor for potential attacks.

• Potential DOS attacks against MySQL Server and MySQL Cluster instances.
• Compromise of availability of MySQL Server and MySQL Cluster instances.
• Need for patching or updating affected versions of MySQL Server and MySQL Cluster.
• Verification of inventory and version tracking for MySQL Server and MySQL Cluster instances.

Technical summary

The vulnerability affects MySQL Server versions 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1 and MySQL Cluster versions 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1. A low-privileged attacker with network access can exploit this vulnerability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server and MySQL Cluster. The vulnerability has a CVSS 3.1 Base Score of 6.5 (Availability impacts) and a CVSS Vector of (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). 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 priority for MySQL Server and MySQL Cluster administrators to assess exposure and apply patches.

Recommended defensive actions

• Assess exposure of MySQL Server and MySQL Cluster instances to this vulnerability.
• Apply patches or updates to affected versions of MySQL Server and MySQL Cluster.
• Monitor for potential DOS attacks against MySQL Server and MySQL Cluster instances.
• Verify inventory of MySQL Server and MySQL Cluster instances for accurate version tracking.
• 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, affected versions, and CVSS score. The vulnerability has a CVSS 3.1 Base Score of 6.5 (Availability impacts) and a CVSS Vector of (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). MySQL Server and MySQL Cluster administrators should assess exposure, apply patches, and monitor for potential attacks.

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.