CVE-2026-21948
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-20

Last updated on: 2026-01-29

Assigner: Oracle

Description
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-01-20
Last Modified
2026-01-29
Generated
2026-05-07
AI Q&A
2026-01-21
EPSS Evaluated
2026-05-05
NVD
CVE-2026-21948
EUVD
EUVD-2026-3561
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
oracle mysql_server From 8.0.0 (inc) to 8.0.44 (inc)
oracle mysql_server From 8.4.0 (inc) to 8.4.7 (inc)
oracle mysql_server From 9.0.0 (inc) to 9.5.0 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
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
Can you explain this vulnerability to me?

This vulnerability exists in the MySQL Server's Optimizer component and affects certain versions of Oracle MySQL Server. It allows a highly privileged attacker with network access through multiple protocols to exploit the server. The exploitation can cause the MySQL Server to hang or crash repeatedly, resulting in a denial of service (DoS) condition.


How can this vulnerability impact me? :

The impact of this vulnerability is that an attacker with high privileges and network access can cause the MySQL Server to hang or crash repeatedly, leading to a complete denial of service. This disrupts availability of the database service.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart