CVE-2026-34271
Denial of Service in Oracle MySQL Group Replication Plugin
Publication date: 2026-04-21
Last updated on: 2026-04-23
Assigner: Oracle
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| oracle | mysql_server | From 8.0.0 (inc) to 8.0.45 (inc) |
| oracle | mysql_server | From 8.4.0 (inc) to 8.4.8 (inc) |
| oracle | mysql_server | From 9.0.0 (inc) to 9.6.0 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-400 | The product does not properly control the allocation and maintenance of a limited resource. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability allows a low privileged attacker to cause a denial of service (DoS) by hanging or crashing the MySQL Server, impacting availability.
However, there is no indication from the provided information that this vulnerability leads to unauthorized disclosure, modification, or loss of data.
Therefore, while it may affect system availability, it does not directly imply a breach of confidentiality or integrity requirements typically emphasized in standards like GDPR or HIPAA.
Organizations relying on MySQL Server should consider the availability impact in their compliance risk assessments, as prolonged downtime could indirectly affect compliance obligations related to service availability.
Can you explain this vulnerability to me?
This vulnerability exists in the MySQL Server product of Oracle MySQL, specifically in the Server: Group Replication Plugin component. It affects supported versions 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0.
The vulnerability is easily exploitable by a low privileged attacker who has network access via multiple protocols. Exploiting this vulnerability allows the attacker to compromise the MySQL Server.
Successful exploitation can cause the MySQL Server to hang or repeatedly crash, resulting in a complete denial of service (DoS) condition.
How can this vulnerability impact me? :
The primary impact of this vulnerability is on the availability of the MySQL Server. An attacker with low privileges and network access can cause the server to hang or crash repeatedly.
This results in a denial of service (DoS), making the MySQL Server unavailable to legitimate users and potentially disrupting business operations that rely on the database.