#VU121743 Improper input validation in MySQL Server - CVE-2026-21965

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Main Vulnerability Database Vulnerabilities #VU121743

#VU121743 Improper input validation in MySQL Server - CVE-2026-21965

Published: January 20, 2026


Vulnerability identifier: #VU121743
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-21965
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
MySQL Server
Software vendor:
Oracle

Description

The vulnerability allows a remote privileged user to perform service disruption.

The vulnerability exists due to improper input validation within the Server: Pluggable Auth component in MySQL Server. A remote privileged user can exploit this vulnerability to perform service disruption.


Remediation

Install updates from vendor's website.

External links