Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Security: Encryption). 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 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-10-20
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Apply Patch
AI Analysis

Impact

A vulnerability in the encryption component of Oracle MySQL Server and MySQL Cluster allows a low‑privileged attacker with network access to send a crafted request that causes the server to crash or hang, leading to a denial of service. The flaw provides no unauthorized data access, so confidentiality and integrity remain intact; only availability is impacted. The weakness is classified as CWE‑284 and CWE‑327.

Affected Systems

Oracle MySQL Server and Oracle MySQL Cluster are affected. In MySQL Server, the vulnerable ranges are 8.4.0‑8.4.12, 9.7.0‑9.7.3, and 26.7.0‑26.7.1. In MySQL Cluster, the affected ranges are 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.

Risk and Exploitability

The CVSS v3.1 base score of 5.3 categorizes the risk as moderate, reflecting mainly availability impact. The EPSS score is below 1%, indicating a very low probability of exploitation, and the vulnerability is not listed in the CISA KEV catalog, suggesting no widespread known exploitation. Attackers need only network connectivity and low privileges; they can trigger the crash by sending a malicious packet over any MySQL protocol, forcing the server to hang or shut down and denying service to legitimate users.

Generated by OpenCVE AI on October 23, 2026 at 05:27 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Oracle MySQL security patch or upgrade to a version that is not affected.
  • Restrict inbound connections to MySQL ports so that only trusted hosts can access the database.
  • Enable and monitor detailed error logging, and set up alerts for unexpected crashes or hangs to allow prompt mitigation.

Generated by OpenCVE AI on October 23, 2026 at 05:27 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-400

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

Type Values Removed Values Added
Title Denial of Service via Crash in Oracle MySQL Server and Cluster mysql: mysql: Denial of Service via security encryption component
Weaknesses CWE-327
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 04:00:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crash in Oracle MySQL Server and Cluster
Weaknesses CWE-400

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: Security: Encryption). 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 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/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': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/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: 2026-10-22T17:31:34.103Z

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

Link: CVE-2026-101762

cve-icon Vulnrichment

Updated: 2026-10-22T17:26:28.639Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:18:31.490

Modified: 2026-10-30T14:51:06.900

Link: CVE-2026-101762

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:46Z

Links: CVE-2026-101762 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T05:30:03Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-327

    Use of a Broken or Risky Cryptographic Algorithm