PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-61109 Oracle Corporation CVE debrief

A vulnerability exists in MySQL Server and MySQL Cluster products of Oracle MySQL, specifically in the Server: JSON component. The affected versions are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. This vulnerability allows a low-privileged attacker with network access via multiple protocols to compromise MySQL Server and MySQL Cluster. Successful attacks can result in unauthorized ability 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 and is classified under CWE-400.

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

Administrators and users of MySQL Server and MySQL Cluster products, especially those with low-privileged access and network access via multiple protocols, should be aware of this vulnerability. They should review the official advisory and take necessary actions to protect their systems.

Technical summary

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). The vulnerability is classified under CWE-400. It 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). Affected versions include MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Administrators should verify their deployments and consider applying patches or mitigations.

Defensive priority

Medium

Recommended defensive actions

  • Apply the patches provided by Oracle in the July 2026 CPU.
  • Restrict network access to MySQL Server and MySQL Cluster to only necessary personnel.
  • Monitor MySQL Server and MySQL Cluster for unusual activity.
  • Consider implementing compensating controls, such as Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS).
  • Review and update asset inventory to identify potentially affected systems.
  • Plan and schedule remediation through normal change control.
  • Track exceptions and retest remediated assets.

Evidence notes

The CVE record was published on 2026-07-21T22:18:42.150Z and was last modified on 2026-07-27T17:41:28.193Z. The NVD entry is currently Analyzed. This information is based on the NVD entry and CVE record. Defenders should verify the affected versions of MySQL Server and MySQL Cluster and review the official advisory for specific details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61109 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61109

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

  • CVE-2026-61109 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61109

    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.