Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: XML). 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: n/a
KEV: No
Impact: Denial of Service
Action: Patch
AI Analysis

Impact

Easily exploitable vulnerability in Oracle MySQL Server and MySQL Cluster's XML component allows an attacker with low privileges to cause the services to hang or crash, resulting in a repeatable denial of service. The flaw stems from improper handling of XML data and is reflected in the CVSS vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, scoring 6.5 for availability impact.

Affected Systems

Oracle MySQL Server versions 8.4.0‑8.4.12, 9.7.0‑9.7.3 and 26.7.0‑26.7.1, and Oracle MySQL Cluster versions 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 are affected.

Risk and Exploitability

The CVSS score of 6.5 indicates moderate severity and the weakness primarily affects availability. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog, but the high availability impact combined with remote network access and low privilege requirements makes it a credible threat for organizations running these products.

Generated by OpenCVE AI on October 21, 2026 at 02:23 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade to MySQL Server 8.4.13 or later, MySQL Cluster 8.0.50 or later, or any newer version that excludes the affected ranges.
  • Apply the latest patch or configuration changes recommended in Oracle's October 2026 security alert.
  • Restrict network access to MySQL services and disable unused protocols to limit low‑privileged exploitation.

Generated by OpenCVE AI on October 21, 2026 at 02:23 UTC.

Tracking

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Advisories

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History

Wed, 21 Oct 2026 02:45:00 +0000

Type Values Removed Values Added
Title MySQL Server and Cluster Denial of Service via XML Processing Vulnerability
Weaknesses CWE-739
CWE-770

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: XML). 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: 2026-10-20T21:22:58.666Z

Reserved: 2026-09-28T15:40:09.507Z

Link: CVE-2026-101794

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T22:18:35.173

Modified: 2026-10-20T22:18:35.173

Link: CVE-2026-101794

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T02:30:13Z

Weaknesses
  • CWE-739
  • CWE-770

    Allocation of Resources Without Limits or Throttling