Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 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 unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.4 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H).
Published: 2026-10-20
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized data modification and denial of service
Action: Apply Patch
AI Analysis

Impact

The vulnerability resides in the Replication component of Oracle MySQL Server and MySQL Cluster. An unauthenticated attacker who can reach the database over the network can trigger a critical flaw that allows them to create, delete, or modify data within the system. The same flaw can also cause the database to hang or crash repeatedly, leading to a denial of service. The CVSS v3.1 base score of 7.4 reflects significant impacts to integrity and availability, with minimal impact to confidentiality.

Affected Systems

The issue affects Oracle MySQL Server versions 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, and 26.7.0 to 26.7.1, as well as MySQL Cluster versions 8.0.0 to 8.0.49, 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, and 26.7.0 to 26.7.1. Only the affected releases listed are vulnerable; later releases are assumed to be fixed.

Risk and Exploitability

The vulnerability is exploitable remotely without authentication and via multiple network protocols, allowing an attacker who can access the replication interfaces to manipulate data or cause a crash. The EPSS score of < 1% indicates a very low probability of exploitation in the wild, and it is not listed in CISA’s KEV catalog. Still, because the flaw can be triggered by sending specially crafted replication traffic over the network, it poses a serious potential impact on integrity and availability should the system remain unpatched.

Generated by OpenCVE AI on October 23, 2026 at 06:38 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update MySQL Server and MySQL Cluster to the latest releases beyond the affected ranges or apply the Oracle patch referenced in the October 2026 security advisory.
  • Configure resource limits or use MySQL’s performance regulation features to prevent excessive replication traffic that could exhaust server resources.
  • Restrict network access to MySQL services using firewalls or VPNs so only trusted hosts can reach the replication interfaces.
  • Monitor replication logs and database activity for abnormal replication attempts or errors, and investigate any suspicious events promptly.

Generated by OpenCVE AI on October 23, 2026 at 06:38 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 23 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770

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

Type Values Removed Values Added
Title Unauthenticated Network Vulnerability in MySQL Server and Cluster Leading to Data Modification and Denial of Service mysql: mysql: unauthorized data modification via replication component
Weaknesses CWE-400
References
Metrics threat_severity

None

 threat_severity

Important

Thu, 22 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 21 Oct 2026 03:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Network Vulnerability in MySQL Server and Cluster Leading to Data Modification and Denial of Service
Weaknesses CWE-284
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: Replication). 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 unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.4 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H'}

Subscriptions

Oracle Mysql Cluster Mysql Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-22T17:30:50.908Z

Reserved: 2026-09-28T15:40:09.505Z

Link: CVE-2026-101775

cve-icon Vulnrichment

Updated: 2026-10-22T17:26:39.169Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:18:33.007

Modified: 2026-10-30T15:08:20.247

Link: CVE-2026-101775

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-20T21:22:51Z

Links: CVE-2026-101775 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T06:45:07Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption