CVE-2026-47040: Critical severity Oracle Oracle Database Server vulnerability
Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 19.3-19.31, 21.3-21.22 and 23.4.0-23.26.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Net Services accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47040?
The severity of CVE-2026-47040 is rated as critical with a score of 9.1.
How do I fix CVE-2026-47040?
To fix CVE-2026-47040, apply the latest security patch provided by Oracle for the affected versions of Oracle Database Server.
Which versions of Oracle Database Server are affected by CVE-2026-47040?
The affected versions of Oracle Database Server are 19.3-19.31, 21.3-21.22, and 23.4.0-23.26.2.
What type of access is required to exploit CVE-2026-47040?
CVE-2026-47040 can be exploited by an unauthenticated attacker with network access via Oracle Net.
What components are impacted by CVE-2026-47040?
CVE-2026-47040 impacts the Oracle Net Services component of Oracle Database Server.