Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). 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 takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published: 2026-10-20
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Server Compromise
Action: Patch Immediately
AI Analysis

Impact

Oracle MySQL Server and MySQL Cluster versions from 8.4.0 to 26.7.1 contain a vulnerability in client‑side code that an unauthenticated network attacker can exploit with high complexity. Successful exploitation can lead to full takeover of the database instance, compromising confidentiality, integrity, and availability. The issue requires no authentication or user interaction, but it demands a precise sequence of network operations over supported protocols to achieve compromise.

Affected Systems

Affected products include Oracle MySQL Server versions 8.4.0-8.4.12, 9.7.0-9.7.3, and 26.7.0-26.7.1, as well as 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. All installations exposed to the network that use the vulnerable client code are at risk; no version beyond those ranges is known to be affected.

Risk and Exploitability

With a CVSS 3.1 base score of 8.1 the vulnerability presents severe confidentiality, integrity, and availability impacts. The EPSS score is < 1% and the issue is not listed in CISA KEV, meaning there are currently no confirmed widespread exploits, but the high impact and unauthenticated nature make it attractive for attackers. The attack can be performed remotely via multiple protocols, but it has high complexity, implying that an experienced adversary with network access could exploit the flaw.

Generated by OpenCVE AI on October 23, 2026 at 02:52 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Download and install the latest MySQL Server or MySQL Cluster patch from Oracle’s security alert for Oct 2026. Ensure the installed version is newer than 8.4.12, 9.7.3, or 26.7.1 in the case of Server and newer than 8.0.49, 8.4.12, 9.7.3, or 26.7.1 for Cluster.
  • If a patch is not yet available, restrict network exposure by firewall rules or VPNs so that only trusted hosts can reach the MySQL port, and disable or remove deprecated client features that are known to be vulnerable.
  • Verify the MySQL configuration enforces secure authentication such as TLS and rejects unauthenticated connections where possible. If possible, enable access control policies that limit the maximum number of concurrent connections from external clients.

Generated by OpenCVE AI on October 23, 2026 at 02:52 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

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

Type Values Removed Values Added
Title mysql: mysql: complete service takeover via network access
Weaknesses CWE-20
References
Metrics threat_severity

None

 threat_severity

Important

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

Type Values Removed Values Added
Title Unauthenticated Remote Compromise via MySQL Client Programs
Weaknesses CWE-119
CWE-287

Thu, 22 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

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

Type Values Removed Values Added
Title Unauthenticated Remote Compromise via MySQL Client Programs
Weaknesses CWE-119
CWE-287

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: Client programs). 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 takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Oracle Mysql Cluster Mysql Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-22T15:17:06.142Z

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

Link: CVE-2026-101771

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:18:32.520

Modified: 2026-10-30T14:18:35.557

Link: CVE-2026-101771

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-20T21:22:50Z

Links: CVE-2026-101771 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T03:00:11Z

Weaknesses
  • CWE-20

    Improper Input Validation

  • CWE-284

    Improper Access Control