Improper input validation in MySQL Cluster - CVE-2026-101798
Published: November 10, 2026
Vulnerability identifier: #VU164010
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101798
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the Server: Optimizer component in MySQL Cluster. A remote privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.
Affected software
MySQL Cluster
MySQL Server
Ubuntu
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)
MySQL Server
Ubuntu
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)
How to mitigate CVE-2026-101798
Install updates from vendor's website.
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.46-0ubuntu0.22.04.5, 8.0.46-0ubuntu0.24.04.5
mysql-server (Ubuntu package) - addressed in versions 8.4.13-0ubuntu0.26.04.2, 9.7.4-0ubuntu0.26.10.1
mysql-server (Ubuntu package) - addressed in versions 8.4.13-0ubuntu0.26.04.2, 9.7.4-0ubuntu0.26.10.1