Improper input validation in MySQL Shell - CVE-2026-34318

Vulnerability identifier: #VU126775

CSH Severity: Medium

CVSS v4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-34318

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote privileged user to gain access to sensitive information.

The vulnerability exists due to improper input validation within the Shell: Core Client component in MySQL Shell. A remote privileged user can exploit this vulnerability to gain access to sensitive information.

MySQL Shell
openEuler
Ubuntu
mysql-8.0 (Ubuntu package)
mysql
mysql-common
mysql-config
mysql-debuginfo
mysql-debugsource
mysql-devel
mysql-errmsg
mysql-help
mysql-libs
mysql-server
mysql-test

Install updates from vendor's website.

mysql-8.0 (Ubuntu package) - addressed in versions 8.0.46-0ubuntu0.20.04.1+esm2, 8.0.46-0ubuntu0.22.04.2, 8.0.46-0ubuntu0.24.04.2, 8.4.9-0ubuntu0.25.10.1, 8.4.9-0ubuntu0.26.04.1
mysql - update to 8.0.46-1
mysql-common - update to 8.0.46-1
mysql-config - update to 8.0.46-1
mysql-debuginfo - update to 8.0.46-1
mysql-debugsource - update to 8.0.46-1
mysql-devel - update to 8.0.46-1
mysql-errmsg - update to 8.0.46-1
mysql-help - update to 8.0.46-1
mysql-libs - update to 8.0.46-1
mysql-server - update to 8.0.46-1
mysql-test - update to 8.0.46-1

• https://www.oracle.com/security-alerts/cpuapr2026.html

• Multiple vulnerabilities in MySQL Shell
• openEuler update for mysql
• Ubuntu update for mysql-8.0
• Ubuntu update for mysql-8.0