CVE-2026-47040

critical · 9.1

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).

9.1

CVSS

0.5%

EPSS (exploit prob.)

40th

EPSS percentile

2026-07-21

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weaknesses

CWE-306

Affected products

Vendor	Product	Affected versions
oracle	database_server	>= 19.3, <= 19.31
oracle	database_server	>= 21.3, <= 21.22
oracle	database_server	>= 23.4, <= 23.26.2

Check a specific version with /api/v1/cve/match.

References

https://www.oracle.com/security-alerts/cpujul2026.html

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-47040