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: < 1% Very Low
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 impacts availability. EPSS score is less than 1%, indicating a very low but non‑zero probability of exploitation. The vulnerability is not listed in the CISA KEV catalog. Because the flaw can be triggered remotely over the network with low privileges, it can still pose a credible threat to organizations running vulnerable MySQL Server or Cluster versions.

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

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest available Oracle patch or upgrade to a MySQL Server or Cluster release newer than 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 23, 2026 at 05:23 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

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

Type Values Removed Values Added
Weaknesses CWE-739
CWE-770

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

Type Values Removed Values Added
Title MySQL Server and Cluster Denial of Service via XML Processing Vulnerability mysql: mysql: Denial of Service via XML component flaw
Weaknesses CWE-91
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 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: 2026-10-22T17:20:19.505Z

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

Link: CVE-2026-101794

cve-icon Vulnrichment

Updated: 2026-10-22T17:02:37.471Z

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2026-10-22T18:17:24.143

Link: CVE-2026-101794

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:58Z

Links: CVE-2026-101794 - Bugzilla

cve-icon OpenCVE Enrichment

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

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-91

    XML Injection (aka Blind XPath Injection)