Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB). 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. Difficult to exploit vulnerability allows high 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-10-20
Score: 4.4 Medium
EPSS: n/a
KEV: No
Impact: Denial of Service
Action: Patch Deployment
AI Analysis

Impact

A vulnerability in the InnoDB engine of Oracle MySQL Server and Cluster allows a high privileged network attacker to trigger repeated crashes or hangs, causing a denial of service to all users. The flaw does not affect confidentiality or integrity, but it can bring the database service down, as the CVSS vector indicates an Availability impact.

Affected Systems

Affected versions include MySQL Server 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1; and MySQL Cluster 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.

Risk and Exploitability

The CVSS base score of 4.4 indicates moderate severity, and the vulnerability has no publicly disclosed exploit, with EPSS marked as not available. No listing in CISA KEV suggests limited use in known campaigns. Attacker must have high privileges and network access via supported protocols; the vector suggests the attack could be performed over the network. Given the lack of zero‑day exploitation evidence, the risk is moderate but activity could be noticeable if DNS or internal traffic shows repeated failures.

Generated by OpenCVE AI on October 21, 2026 at 00:29 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Oracle patch or upgrade MySQL to a version later than 8.4.12, 9.7.3, or 26.7.1 for Server and later than 8.0.49, 8.4.12, 9.7.3, or 26.7.1 for Cluster
  • Restrict network access to MySQL ports to trusted administrative hosts, using firewall rules or secure network segments
  • Monitor MySQL logs and performance metrics for repeated hangs or crashes and configure alerts when thresholds are exceeded

Generated by OpenCVE AI on October 21, 2026 at 00:29 UTC.

Tracking

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Advisories

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History

Wed, 21 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Title InnoDB Component Vulnerability Allowing Denial of Service in MySQL Server and Cluster
Weaknesses CWE-119
CWE-400

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: InnoDB). 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. Difficult to exploit vulnerability allows high 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/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': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/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: 2026-10-20T21:21:58.696Z

Reserved: 2026-09-28T15:40:09.496Z

Link: CVE-2026-101627

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T22:18:16.723

Modified: 2026-10-20T22:18:16.723

Link: CVE-2026-101627

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T00:30:12Z

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer

  • CWE-400

    Uncontrolled Resource Consumption