CVE-2026-21941

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. 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).

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.oracle.com/security-alerts/cpujan2026.html	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:oracle:mysql_server::::::::
	cpe:2.3:a:oracle:mysql_server::::::::
	cpe:2.3:a:oracle:mysql_server::::::::

History

29 Jan 2026, 15:31

Type	Values Removed	Values Added
First Time		Oracle mysql Server Oracle
CPE		cpe:2.3:a:oracle:mysql_server::::::::
References	~~() https://www.oracle.com/security-alerts/cpujan2026.html -~~	() https://www.oracle.com/security-alerts/cpujan2026.html - Vendor Advisory

21 Jan 2026, 15:16

Type	Values Removed	Values Added
CWE		CWE-400

20 Jan 2026, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-20 22:15

Updated : 2026-01-29 15:31

NVD link : CVE-2026-21941

Mitre link : CVE-2026-21941

CVE.ORG link : CVE-2026-21941

JSON object : View

Products Affected

oracle

mysql_server

CWE

CWE-400

Uncontrolled Resource Consumption

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