CVE-2026-21950

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer)

Medium · published January 20, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.4
In the wild
Unconfirmed
What it is

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.0.0-9.5.0. Easily exploitable 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00376 · 30.4th percentile
Published
2026-01-20T21:56Z
EPSS history
Timeline
  • 20 JAN 21:56Z
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer)
    cvelistv5