CVE-2026-101747 Oracle Corporation CVE debrief

Who should care

MySQL Server and MySQL Cluster administrators, DBAs, and security teams should assess exposure and apply patches or updates to affected versions. This includes reviewing the inventory of MySQL Server and MySQL Cluster instances, monitoring for potential exploitation attempts, and verifying the effectiveness of compensating controls. Additionally, operators, platform administrators, and vulnerability management teams should be aware of the potential impact,

Why it matters

CVE-2026-101747 is a medium-severity vulnerability in MySQL Server and MySQL Cluster that allows a low-privileged attacker with network access to cause a hang or frequently repeatable crash (complete DOS). MySQL Server and MySQL Cluster administrators, DBAs, and security teams should assess exposure and apply patches or updates to affected versions. The vulnerability has a CVSS score of 6.5 and affects multiple versions of MySQL Server and MySQL Cluster. Evidence is based on official CVE and NVD records.

• Potential DOS impacting availability of MySQL Server and MySQL Cluster instances.
• Need to verify inventory of MySQL Server and MySQL Cluster instances.
• Requires patching or updating affected versions of MySQL Server and MySQL Cluster.
• May require monitoring for potential exploitation attempts.

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 score of 6.5 and a severity rating of MEDIUM. MySQL Server and MySQL Cluster administrators, DBAs, and security teams should assess exposure and apply patches or updates to affected versions.

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 exploitation attempts.
• Verify inventory of MySQL Server and MySQL Cluster instances.
• 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 entry provide details on the vulnerability, affected versions, and CVSS score. Evidence is based on official CVE and NVD records, with no additional information available. Defenders should verify the inventory of MySQL Server and MySQL Cluster instances, assess exposure, and apply patches or updates to affected versions.

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.