---
id: CVE-2026-83271
title: Vulnerability in the RDBMS component of Oracle Database Server
summary: >-
  Vulnerability in the RDBMS component of Oracle Database Server.  Supported
  versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3.
  Easily exploitable vulnerability allows low privileged attacker having Execute
  on DBMS_…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
vendor: Oracle Corporation
product: Oracle Database Server
affected:
  - oracle_database_server >= 19.3 <= 19.32
  - oracle_database_server >= 21.3 <= 21.23
  - oracle_database_server >= 23.4.0 <= 23.26.3
published: '2026-09-15'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T14:17:38.773'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83271'
references:
  - url: 'https://www.oracle.com/security-alerts/cspusep2026.html'
    label: secalert_us@oracle.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T13:00:48.071307Z'
epss: 0.00417
epssPercentile: 0.35716
ingestedAt: '2026-09-15T20:44:02.510Z'
---

## Overview

Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION 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).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.