Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Pluggable Auth). 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

\"The vulnerability resides in the Pluggable Auth component of Oracle MySQL Server and Cluster. It allows an attacker with limited privileges on the same network to trigger a hang or crash, rendering the database services unavailable. The flaw does not affect confidentiality or integrity.\"

Affected Systems

Affected are Oracle 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 the corresponding MySQL Cluster releases in the same version ranges. Both the server and cluster deployments are impacted.

Risk and Exploitability

\"The CVSS base score is 6.5, indicating a moderate availability impact. The EPSS score is <1%, indicating a low probability of exploitation, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is over the network via any MySQL compatible protocol, allowing a low‑privileged attacker to repeatedly induce crashes and potentially exhaust system resources.\"

Generated by OpenCVE AI on October 23, 2026 at 02:30 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Oracle MySQL security patch that excludes affected version ranges.
  • Restrict network access to MySQL instances, allowing connections only from trusted hosts and enforcing least privilege.
  • Implement connection limits, timeouts, and resource quotas to mitigate the impact of a denial of service attack.

Generated by OpenCVE AI on October 23, 2026 at 02:30 UTC.

Tracking

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Advisories

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History

Fri, 23 Oct 2026 03:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-399

Fri, 23 Oct 2026 02:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-399

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

Type Values Removed Values Added
Title Denial of Service via Pluggable Auth Exploit in MySQL Server and Cluster mysql: mysql: Denial of Service in Pluggable Auth
Weaknesses CWE-303
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 02:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Pluggable Auth Exploit in MySQL Server and Cluster
Weaknesses CWE-399

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: Pluggable Auth). 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: 2026-10-22T17:45:54.535Z

Reserved: 2026-09-28T15:40:09.502Z

Link: CVE-2026-101728

cve-icon Vulnrichment

Updated: 2026-10-22T17:43:35.208Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:18:27.620

Modified: 2026-10-22T18:17:16.767

Link: CVE-2026-101728

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:33Z

Links: CVE-2026-101728 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T02:45:03Z

Weaknesses