CVE-2026-34272
Denial of Service in Oracle MySQL Server Optimizer Component
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 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 results in a denial of service (DoS) condition by allowing an attacker to cause the MySQL Server to hang or crash repeatedly. It does not impact confidentiality or integrity of data directly.
Since the vulnerability affects availability only and does not lead to unauthorized data access or modification, its impact on compliance with standards like GDPR or HIPAA—which emphasize data confidentiality and integrity—is limited.
However, availability is also a component of many compliance frameworks, so repeated outages or service disruptions caused by this vulnerability could potentially affect compliance related to system availability requirements.
Can you explain this vulnerability to me?
This vulnerability exists in the MySQL Server product of Oracle MySQL, specifically in the Server Optimizer component. It affects supported versions from 9.0.0 to 9.6.0. The vulnerability is easily exploitable by a low privileged attacker who has network access through multiple protocols.
An attacker exploiting this vulnerability can cause the MySQL Server to hang or crash repeatedly, resulting in a complete denial of service (DoS).
How can this vulnerability impact me? :
The primary impact of this vulnerability is on the availability of the MySQL Server. A successful attack can cause the server to hang or crash frequently, leading to a complete denial of service.
This means that legitimate users may be unable to access the database services, potentially disrupting applications and services that rely on MySQL Server.