CVE-2026-35240
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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| Percentile: |
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-284 | The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. |
Attack-Flow Graph
AI Powered Q&A
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 8.0.0-8.0.45, 8.4.0-8.4.8, and 9.0.0-9.6.0.
The vulnerability is easily exploitable by a high privileged attacker who has network access via multiple protocols. Such an attacker can compromise the MySQL Server.
Successful exploitation can result in the attacker causing the MySQL Server to hang or crash repeatedly, leading to a complete denial of service (DoS).
How can this vulnerability impact me? :
The main impact of this vulnerability is on the availability of the MySQL Server. An attacker with high privileges and network access can exploit this vulnerability to cause the server to hang or crash repeatedly.
This results in a complete denial of service (DoS), making the MySQL Server unavailable to legitimate users and potentially disrupting business operations that rely on the database.