Vulnerability in MySQL Server Group Replication Plugin by Oracle
CVE-2026-34276

6.5MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
21 April 2026

What is CVE-2026-34276?

A vulnerability exists in the Group Replication Plugin of Oracle's MySQL Server, potentially allowing low-privileged attackers with network access to exploit the system. This can result in unauthorized operations that lead to server hangs or frequently repeatable crashes, effectively causing a denial of service. The affected versions include MySQL Server 8.0.0 to 8.0.45, 8.4.0 to 8.4.8, and 9.0.0 to 9.6.0. Organizations using these versions should take immediate action to mitigate risks.

Affected Version(s)

MySQL Server 8.0.0 <= 8.0.45

MySQL Server 8.4.0 <= 8.4.8

MySQL Server 9.0.0 <= 9.6.0

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.