Vulnerability in the RDBMS component of Oracle Database Server. (CVE-2026-83271)
A vulnerability exists in the RDBMS component of Oracle Database Server affecting versions 19.3 through 19.32, 21.3 through 21.23, and 23.4.0 through 23.26.3. This vulnerability allows a low privileged attacker with Execute privilege on DBMS_REDEFINITION and network access via Oracle Net to compromise the database server. Successful exploitation can lead to full takeover of the RDBMS. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with impacts on confidentiality, integrity, and availability. Oracle has released security patches addressing this and many other vulnerabilities in their September 2026 Critical Security Patch Update.
AI Analysis
Technical Summary
CVE-2026-83271 is a high-severity vulnerability in the Oracle Database Server's RDBMS component. It affects supported versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. The flaw allows an attacker with low privileges (Execute on DBMS_REDEFINITION) and network access via Oracle Net to compromise the database server, potentially resulting in full takeover. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, reflecting network attack vector, low attack complexity, low privilege required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. Oracle's September 2026 Critical Security Patch Update includes fixes for this vulnerability among 673 others across multiple products.
Potential Impact
The vulnerability enables a low privileged attacker with Execute privilege on DBMS_REDEFINITION and network access to fully compromise the Oracle Database Server, impacting confidentiality, integrity, and availability of the database. This could lead to complete takeover of the RDBMS component.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Customers are strongly advised to apply the relevant patches promptly to affected Oracle Database Server versions (19.3-19.32, 21.3-21.23, 23.4.0-23.26.3). Oracle recommends remaining on actively-supported versions and applying security patches without delay to mitigate this and other vulnerabilities.
Vulnerability in the RDBMS component of Oracle Database Server. (CVE-2026-83271)
Description
A vulnerability exists in the RDBMS component of Oracle Database Server affecting versions 19.3 through 19.32, 21.3 through 21.23, and 23.4.0 through 23.26.3. This vulnerability allows a low privileged attacker with Execute privilege on DBMS_REDEFINITION and network access via Oracle Net to compromise the database server. Successful exploitation can lead to full takeover of the RDBMS. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with impacts on confidentiality, integrity, and availability. Oracle has released security patches addressing this and many other vulnerabilities in their September 2026 Critical Security Patch Update.
CVSS v3.1
Score 8.8high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-83271 is a high-severity vulnerability in the Oracle Database Server's RDBMS component. It affects supported versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. The flaw allows an attacker with low privileges (Execute on DBMS_REDEFINITION) and network access via Oracle Net to compromise the database server, potentially resulting in full takeover. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, reflecting network attack vector, low attack complexity, low privilege required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. Oracle's September 2026 Critical Security Patch Update includes fixes for this vulnerability among 673 others across multiple products.
Potential Impact
The vulnerability enables a low privileged attacker with Execute privilege on DBMS_REDEFINITION and network access to fully compromise the Oracle Database Server, impacting confidentiality, integrity, and availability of the database. This could lead to complete takeover of the RDBMS component.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Customers are strongly advised to apply the relevant patches promptly to affected Oracle Database Server versions (19.3-19.32, 21.3-21.23, 23.4.0-23.26.3). Oracle recommends remaining on actively-supported versions and applying security patches without delay to mitigate this and other vulnerabilities.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hq6g-wv4r-xv4r
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-83271"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaa07de55bf5e2cf5ea32d6
Added to database: 09/16/2026, 03:07:10 UTC
Last enriched: 09/16/2026, 04:05:23 UTC
Last updated: 09/16/2026, 05:01:23 UTC
Views: 3
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