Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: C API). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-10-20
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service via crash of MySQL Server or Cluster when receiving malformed network data
Action: Patch Immediately
AI Analysis

Impact

This vulnerability resides in the C API of Oracle MySQL Server and MySQL Cluster. It allows a low‑privileged attacker with network access to supply malformed input over supported protocols, causing the database engine to hang or crash repeatedly. The result is a denial of service, compromising the availability of the affected database services. The weakness is improper handling of invalid or malicious input, corresponding to CWE-284 (Improper Access Control) and CWE-400 (Uncontrolled Resource Consumption).

Affected Systems

Affected vendors are Oracle Corporation for both MySQL Server and MySQL Cluster. For MySQL Server, the affected releases are 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1. For MySQL Cluster, the affected releases are 8.0.0 through 8.0.49, 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1. Users running these releases are at risk, while any newer releases beyond those ranges are not impacted.

Risk and Exploitability

The vulnerability has a CVSS v3.1 base score of 6.5, reflecting significant availability impacts. EPSS score is < 1% and it is not listed in the CISA KEV catalog. The likely attack vector is through network protocols that interact with the C API, enabling an attacker to trigger the crash with minimal privileges. Because the problem is classified as easily exploitable, organizations should treat the risk as high until a fix is applied.

Generated by OpenCVE AI on October 23, 2026 at 06:17 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade MySQL Server to versions newer than 8.4.12, 9.7.3, and 26.7.1, and upgrade MySQL Cluster to versions newer than 8.0.49, 8.4.12, 9.7.3, and 26.7.1.
  • Implement input validation and error‑handling routines to mitigate CWE-284 and CWE-400 weaknesses in the C API processing.
  • Configure firewall rules to restrict MySQL service ports (3306) to trusted networks or localhost, limiting the potential attacker’s network access.
  • Set up automated monitoring or a watchdog process that detects MySQL crashes or hangs and restores the service to maintain availability.

Generated by OpenCVE AI on October 23, 2026 at 06:17 UTC.

Tracking

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Advisories

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History

Fri, 23 Oct 2026 02:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Title Denial of Service Vulnerability in MySQL Server and MySQL Cluster via C API misuse mysql: From CVEorg collector
Weaknesses CWE-400
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 22 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 21 Oct 2026 04:00:00 +0000

Type Values Removed Values Added
Title Denial of Service Vulnerability in MySQL Server and MySQL Cluster via C API misuse
Weaknesses CWE-20

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: C API). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
First Time appeared Oracle
Oracle mysql Cluster
Oracle mysql Server
CPEs cpe:2.3:a:oracle:mysql_cluster:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle mysql Cluster
Oracle mysql Server
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Oracle Mysql Cluster Mysql Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-22T17:46:21.029Z

Reserved: 2026-09-28T15:40:09.502Z

Link: CVE-2026-101725

cve-icon Vulnrichment

Updated: 2026-10-22T17:43:29.503Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:18:27.290

Modified: 2026-10-22T18:17:16.347

Link: CVE-2026-101725

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:32Z

Links: CVE-2026-101725 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T06:30:07Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption