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CVE-2026-91568: Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via Oracle Net to compromise RDBMS. While the vulnerability is in RDBMS, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all RDBMS accessible data. in Oracle Corporation Oracle Database Server

0
High
VulnerabilityCVE-2026-91568cvecve-2026-91568
Published: 10/20/2026 (10/20/2026, 21:26:33 UTC)
Source: CVE Database V5
Vendor/Project: Oracle Corporation
Product: Oracle Database Server

Description

Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via Oracle Net to compromise RDBMS. While the vulnerability is in RDBMS, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all RDBMS accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).

CVSS v3.1

Score 7.7high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected software

Oracle Corporation

Oracle Database Server

Affected versions
>=23.4.0 <=23.26.3

Technical Details

Data Version
5.2
Assigner Short Name
oracle
Date Reserved
2026-09-14T22:10:16.645Z
Cvss Version
3.1
State
PUBLISHED
Vendor Advisory Urls
[{"url":"https://www.oracle.com/security-alerts/cpuoct2026.html","vendor":"Oracle"}]

Threat ID: 6ad7df612cdf04f65664240a

Added to database: 10/20/2026, 21:38:41 UTC

Last updated: 10/20/2026, 21:50:01 UTC

Views: 2

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