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CVE-2026-61093 Oracle Corporation CVE debrief

A vulnerability exists in MySQL Server and MySQL Cluster products of Oracle MySQL. The vulnerability is located in the Server: Optimizer component and affects versions 9.7.0-9.7.1 of both products. A low-privileged attacker with network access via multiple protocols can exploit this vulnerability to compromise MySQL Server and MySQL Cluster, potentially causing a hang or frequently repeatable crash (complete DOS). The CVSS 3.1 Base Score is 6.5, indicating a medium severity level.

Vendor
Oracle Corporation
Product
MySQL Server
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-21
Original CVE updated
2026-07-27
Advisory published
2026-07-21
Advisory updated
2026-07-27

Who should care

System administrators and security teams responsible for MySQL Server and MySQL Cluster installations, particularly those using versions 9.7.0-9.7.1, should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

A vulnerability exists in the Server: Optimizer component of MySQL Server and MySQL Cluster products of Oracle MySQL, affecting versions 9.7.0-9.7.1. This weakness allows a low-privileged attacker with network access via multiple protocols to compromise MySQL Server and MySQL Cluster, potentially causing a hang or frequently repeatable crash (complete DOS). The CVSS 3.1 Base Score is 6.5, indicating a medium severity level, with the CVSS vector being CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. The vulnerability is classified under CWE-400. System administrators and security teams should prioritize patching or mitigating this vulnerability to prevent potential denial-of-service attacks.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it can be exploited by low-privileged attackers to cause a denial of service.

Recommended defensive actions

  • Apply the patches or updates provided by Oracle to fix the vulnerability
  • Restrict network access to MySQL Server and MySQL Cluster to only necessary personnel
  • Monitor MySQL Server and MySQL Cluster installations for any suspicious activity
  • Consider implementing compensating controls, such as web application firewalls or intrusion detection systems
  • Review and update asset inventory to identify potentially affected systems
  • Perform exposure review to assess potential impact on the organization
  • Track changes and updates to affected systems and CVE details

Evidence notes

The CVE record was published on 2026-07-21T22:18:40.333Z and was last modified on 2026-07-27T17:49:21.220Z. The NVD entry is currently Analyzed. The vulnerability is described in the Oracle Security Alert for July 2026.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61093 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61093

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-61093 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61093

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.