Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Parser). 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: Apply Patch
AI Analysis

Impact

A parser weakness in Oracle MySQL Server and MySQL Cluster permits a low‑privileged attacker with network access to trigger the database services to hang or crash repeatedly. The flaw resides in the Server: Parser component and does not provide code execution or data exfiltration, but it can take the database offline, disrupting all applications that depend on the instance.

Affected Systems

Oracle Corporation 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, as well as MySQL Cluster releases 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, are affected by this vulnerability whenever the Server: Parser component is present.

Risk and Exploitability

The CVSS 3.1 score of 6.5, with an availability impact, indicates moderate severity. Because the vector is network‑based, the attack requires low privilege and no user interaction, an attacker can exploit the flaw remotely. However, the EPSS score of less than 1% signifies a very low probability of active exploitation in the wild, and the vulnerability is not listed in the CISA KEV catalog. If exploited, the attacker could repeatedly crash the MySQL services until they are manually restarted or patched.

Generated by OpenCVE AI on October 23, 2026 at 06:14 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade MySQL Server or MySQL Cluster to any release that follows 8.4.12, 9.7.3, or 26.7.1 as highlighted in Oracle’s CPU Oct 2026 advisory.
  • Thoroughly restrict network connectivity to MySQL ports, allowing only trusted hosts, VPNs, or internal networks to communicate with the database servers.
  • Configure resource limits or query throttling on the database to curb repeated crash attempts and give administrators time to apply the patch or restart the service.

Generated by OpenCVE AI on October 23, 2026 at 06:14 UTC.

Tracking

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Advisories

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History

Fri, 23 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-20

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

Type Values Removed Values Added
Title Denial of Service via Parser Vulnerability in Oracle MySQL Server and Cluster mysql: mysql: Denial of Service via the Server Parser
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 03:30:00 +0000

Type Values Removed Values Added
Title Denial of Service via Parser Vulnerability in Oracle MySQL Server and Cluster
Weaknesses CWE-119
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: Server: Parser). 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: 2026-10-22T17:19:31.594Z

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

Link: CVE-2026-101802

cve-icon Vulnrichment

Updated: 2026-10-22T17:02:42.816Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:18:36.087

Modified: 2026-10-22T18:17:24.703

Link: CVE-2026-101802

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:23:02Z

Links: CVE-2026-101802 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T06:15:13Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption