CVE-2026-21929

MEDIUM

MySQL Server 9.0.0-9.5.0 - Denial of Service in Server Parser

Title source: llm
STIX 2.1

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. Difficult to exploit vulnerability allows low 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 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).

References (1)

Core 1
Core References

Scores

CVSS v3 5.3
EPSS 0.0007
EPSS Percentile 21.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

Status published
Products (1)
oracle/mysql_server 9.0.0 - 9.5.0
Published Jan 20, 2026
Tracked Since Feb 18, 2026