Flaw in MySQL Server by Oracle Affecting User Authentication Protocols
CVE-2026-21965

2.7LOW

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21965?

A vulnerability exists in Oracle's MySQL Server within the pluggable authentication component. This flaw affects multiple versions and allows attackers with high privileges and network access to compromise the server. The vulnerability could be exploited via various protocols. Successful exploitation may lead to a partial denial of service, where the server's availability is impacted. Users of affected versions should take immediate steps to secure their installations as detailed in the Oracle Advisory.

Affected Version(s)

MySQL Server 9.0.0 <= 9.5.0

References

https://www.oracle.com/security-alerts/cpujan2026.html
vendor-advisory

CVSS V3.1

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.