CVE-2026-101777 Oracle Corporation CVE debrief

Who should care

MySQL Server and MySQL Cluster administrators, database security teams, and IT personnel responsible for patch management and vulnerability remediation. These individuals should prioritize patching and verify the integrity of their systems. They should also review compensating controls for exposed systems while remediation is scheduled and verified, and monitor for potential DOS and unauthorized data access attempts.

Why it matters

CVE-2026-101777 is a medium-severity vulnerability in MySQL Server and MySQL Cluster that allows high-privileged attackers to cause a hang or crash and gain unauthorized read access to a subset of data. MySQL Server and MySQL Cluster administrators should prioritize patching and verify the integrity of their systems.

• Potential for high-impact DOS attacks against MySQL Server and MySQL Cluster
• Risk of unauthorized data access and exposure
• Need for urgent patching and verification of vulnerable versions
• Potential for attackers to leverage this vulnerability as part of a larger exploit chain

Technical summary

The vulnerability, located in the Server: Security: Encryption component, allows high-privileged attackers with network access via multiple protocols to compromise MySQL Server and MySQL Cluster. Successful attacks can result in a hang or frequently repeatable crash (complete DOS) and unauthorized read access to a subset of accessible data. The vulnerability affects MySQL Server: 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 9.7.0-9.7.3 and 26.7.0-26.7.1. CVSS 3.1 Base Score 5.5 (Confidentiality and Availability impacts).

Defensive priority

Medium-priority patching and verification recommended for MySQL Server and MySQL Cluster administrators.

Recommended defensive actions

• Apply patches for MySQL Server and MySQL Cluster versions 9.7.0-9.7.3 and 26.7.0-26.7.1
• Verify and restrict network access to MySQL Server and MySQL Cluster
• Monitor for potential DOS and unauthorized data access attempts
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, affected versions, and potential impacts. The vulnerability is located in the Server: Security: Encryption component of MySQL Server and MySQL Cluster. High-privileged attackers with network access via multiple protocols can compromise MySQL Server and MySQL Cluster. Successful attacks can result in a hang or frequently repeatable crash (complete DOS) and unauthorized read access to a subset of accessible data. MySQL Server and MySQL Cluster administrators should apply

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.