Vulnerability in MySQL Server Product by Oracle
CVE-2026-21952

4.9MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21952?

A vulnerability exists in Oracle's MySQL Server, specifically within the Server: Parser component. This flaw affects versions 9.0.0 through 9.5.0 and can be exploited by a high-privileged attacker with network access over multiple protocols. The vulnerability allows the attacker to cause a denial-of-service condition, leading to either a system hang or a crash of the MySQL Server, potentially disrupting critical services.

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:
4.9
Severity:
MEDIUM
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

.