CVE-2026-21948

MEDIUM

4.9

Description

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).

CVE Details

CVSS v3.1 Score4.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published1/20/2026

Last Modified1/29/2026

Sourcenvd

Honeypot Sightings0

Affected Products

oracle:mysql_server

Weaknesses (CWE)

CWE-400

References

https://www.oracle.com/security-alerts/cpujan2026.html(secalert_us@oracle.com)

IOC Correlations

No correlations recorded

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