Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Components Services). 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
Action: Patch
AI Analysis

Impact

The vulnerability in Oracle’s MySQL Server and MySQL Cluster allows an attacker with low privileges who can reach the database over the network to trigger a hang or crash in the server, causing a complete denial of service. The flaw is identified as an available‑only impact (CVE vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) and results exclusively in availability loss rather than unauthorized data access or modification. The weakness stems from weaknesses in input handling and resource management: missing or weak authorization checks (CWE-284), and uncontrolled denial of service conditions (CWE-400).

Affected Systems

Affected products are Oracle MySQL Server versions 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1; and Oracle MySQL Cluster versions 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. No other product or version information was provided.

Risk and Exploitability

The CVSS 3.1 base score of 6.5 indicates a moderate severity, with the high availability sub score underscoring the potential impact on business operations. The EPSS score of < 1% indicates a very low probability of exploitation, and the vulnerability is not currently listed in the CISA KEV catalogue. Based on the description, the attack vector is likely a network-based compromise that does not require elevated privileges, making it accessible to attackers who can reach the MySQL instance through supported protocols.

Generated by OpenCVE AI on October 23, 2026 at 05:25 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade MySQL Server and MySQL Cluster to a version newer than those listed as affected (e.g., 8.4.13 or higher, 9.7.4 or higher, 26.7.2 or higher, and any MySQL Cluster version beyond 8.0.49) as recommended by the October 2026 CPU advisory.
  • Apply the official patch or hotfix released by Oracle for this vulnerability.
  • If patching cannot be performed immediately, restrict network access to the MySQL instance to trusted IP addresses and disable or firewall any unused network protocols that could be exploited.

Generated by OpenCVE AI on October 23, 2026 at 05:25 UTC.

Tracking

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Advisories

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History

Fri, 23 Oct 2026 02:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119

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

Type Values Removed Values Added
Title Denial of Service Vulnerability in Oracle MySQL Server and Cluster mysql: mysql: Denial of Service
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 03:00:00 +0000

Type Values Removed Values Added
Title Denial of Service Vulnerability in Oracle MySQL Server and Cluster
Weaknesses CWE-119

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: Server: Components Services). 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: 2026-10-22T17:22:12.821Z

Reserved: 2026-09-28T15:40:09.506Z

Link: CVE-2026-101778

cve-icon Vulnrichment

Updated: 2026-10-22T17:02:12.712Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:18:33.363

Modified: 2026-10-30T15:16:24.163

Link: CVE-2026-101778

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:52Z

Links: CVE-2026-101778 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T05:30:03Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption