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 DBMS_VECTOR privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Published: 2026-10-20
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Database Takeover
Action: Immediate Patch
AI Analysis

Impact

An easily exploitable flaw in Oracle Database Server’s RDBMS component allows a low‑privileged attacker possessing the DBMS_VECTOR privilege to compromise the database over the network. The vulnerability leads to a full takeover of the RDBMS, compromising confidentiality, integrity and availability with a CVSS 3.1 base score of 8.8.

Affected Systems

Oracle Corporation’s Oracle Database Server, versions 23.4.0 through 23.26.3, are affected by this vulnerability. The flaw is present in the RDBMS component of all supported releases within this version range.

Risk and Exploitability

The need for only low‑privilege database rights together with remote access via Oracle Net makes this issue highly exploitable. The EPSS score indicates an exploitation probability of less than 1%, and the flaw is not listed in the CISA KEV catalog; together with the high CVSS score it suggests a serious threat. A remote attacker can use the vulnerability to take complete control of the database, enabling further compromise of the underlying host and other connected systems.

Generated by OpenCVE AI on October 24, 2026 at 07:52 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Oracle Database Server patch released in the Oracle Critical Update for versions 23.4.0-23.26.3
  • Restrict Oracle Net traffic to trusted hosts by configuring firewalls or network ACLs
  • Review and limit the use of the DBMS_VECTOR privilege, removing it from low‑privileged accounts if possible

Generated by OpenCVE AI on October 24, 2026 at 07:52 UTC.

Tracking

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Advisories

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History

Sun, 25 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sat, 24 Oct 2026 08:15:00 +0000

Type Values Removed Values Added
Title Low-privilege Oracle Database Takeover via Oracle Net

Sat, 24 Oct 2026 06:45:00 +0000

Type Values Removed Values Added
Title Low‑Privilege RDBMS Takeover via Oracle Net in Oracle Database Server
Weaknesses CWE-284
CWE-862

Sat, 24 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269

Thu, 22 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Oracle database Server
Oracle Corporation
Oracle Corporation oracle Database Server
Vendors & Products Oracle database Server
Oracle Corporation
Oracle Corporation oracle Database Server

Wed, 21 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
Title Low‑Privilege RDBMS Takeover via Oracle Net in Oracle Database Server
Weaknesses CWE-284
CWE-862

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
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 DBMS_VECTOR privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
First Time appeared Oracle
Oracle database - Rdbms
CPEs cpe:2.3:a:oracle:database_-_rdbms:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle database - Rdbms
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Oracle Database - Rdbms Database Server
Oracle Corporation Oracle Database Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-24T03:35:54.429Z

Reserved: 2026-09-14T22:10:16.638Z

Link: CVE-2026-91499

cve-icon Vulnrichment

Updated: 2026-10-24T03:35:48.797Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:54.450

Modified: 2026-10-24T04:18:26.563

Link: CVE-2026-91499

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-24T08:00:15Z

Weaknesses
  • CWE-269

    Improper Privilege Management