Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Easily exploitable 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-07-21
Score: 4.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A flaw in the replication component of Oracle MySQL Server and MySQL Cluster allows a high‑privilege attacker who can reach the database over network protocols to cause the server to hang or crash repeatedly. The crashes are complete, resulting in a denial of all database operations. No confidential data is disclosed and integrity is not altered; the sole consequence is the loss of availability.

Affected Systems

Oracle MySQL Server versions 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1, and Oracle MySQL Cluster versions 8.0.0 through 8.0.47 and their 8.4.x and 9.7.x counterparts are affected.

Risk and Exploitability

The CVSS 3.1 base score of 4.9 reflects moderate severity limited to availability. The EPSS score is below 1%, indicating a low probability of real‑world exploitation. The vulnerability is not listed in the CISA KEV catalog. An attacker would need network access to the replication subsystem and must be able to initiate or influence replication traffic to trigger the crash; no user interaction is required.

Generated by OpenCVE AI on August 3, 2026 at 00:00 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest patch or update released by Oracle that resolves the replication component flaw. Consult Oracle’s release notes for the specific version that contains the fix.
  • Limit replication and administrative access to trusted, isolated hosts and disable any unused replication protocols until the official patch is applied.
  • Monitor server logs for abnormal hang or crash events and investigate any sudden loss of availability promptly.

Generated by OpenCVE AI on August 3, 2026 at 00:00 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 01 Aug 2026 07:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-388

Tue, 28 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title MySQL Server/Cluster Remote Denial of Service via Replication Exploit mysql: Replication unspecified vulnerability (CPU Jul 2026)
Weaknesses CWE-770
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 24 Jul 2026 02:45:00 +0000

Type Values Removed Values Added
Title MySQL Server/Cluster Remote Denial of Service via Replication Exploit
Weaknesses CWE-388

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 21 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Description Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Easily exploitable 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/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': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/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: 2026-07-23T15:27:02.974Z

Reserved: 2026-05-18T15:55:10.317Z

Link: CVE-2026-47023

cve-icon Vulnrichment

Updated: 2026-07-23T15:26:52.020Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-21T00:00:00Z

Links: CVE-2026-47023 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T00:15:17Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-770

    Allocation of Resources Without Limits or Throttling