Improper input validation in MySQL Router - CVE-2026-46862
Published: September 14, 2026
Vulnerability identifier: #VU149694
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46862
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the Router: General component in MySQL Router. A remote non-authenticated attacker can exploit this vulnerability to perform a denial of service (DoS) attack.
Affected software
MySQL Router
Ubuntu
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)
Ubuntu
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)
How to mitigate CVE-2026-46862
Install updates from vendor's website.
MySQL Router - addressed in versions 8.4.10, 9.7.1
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.46-0ubuntu0.22.04.3, 8.0.46-0ubuntu0.24.04.3
mysql-server (Ubuntu package) - addressed in versions 8.4.10-0ubuntu0.25.10.1, 8.4.10-0ubuntu0.26.04.1
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.46-0ubuntu0.22.04.3, 8.0.46-0ubuntu0.24.04.3
mysql-server (Ubuntu package) - addressed in versions 8.4.10-0ubuntu0.25.10.1, 8.4.10-0ubuntu0.26.04.1