CVE-2026-21952
MediumVulnerability Description
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Parser). Supported versions that are affected are 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 Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Known Affected Software
5 configuration(s) from 1 vendor(s)
cpe:2.3:a:oracle:mysql_server:9.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:9.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:9.0.0:*:*:*:*:*:*:*
CVE-2026-21952
CVE-2026-21952
CPUJAN2026
Oracle Critical Patch Update Advisory - January 2026
Severity Details
Weakness Type (CWE)
Uncontrolled Resource Consumption
- Description
- The product does not properly control the allocation and maintenance of a limited resource.
- Exploit Likelihood
- High
- Typical Severity
- High
- Abstraction Level
- Class
Key Information
- Published Date
- January 20, 2026
