CVE-2026-71102

Analyzed Analyzed - Analysis Complete

Portable Clusterware Remote Code Execution in Oracle Database

Publication date: 2026-08-18

Last updated on: 2026-08-20

Assigner: Oracle

Description

Vulnerability in the Portable Clusterware 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 unauthenticated attacker with network access via HTTP to compromise Portable Clusterware. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Portable Clusterware accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Portable Clusterware. CVSS 3.1 Base Score 9.1 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-18

Last Modified

2026-08-20

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-71102

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	database_server	From 23.4.0 (inc) to 23.26.3 (inc)
oracle	database_server	From 19.3 (inc) to 19.32 (inc)
oracle	database_server	From 21.3 (inc) to 21.23 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Database Server's Portable Clusterware component affecting versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. An unauthenticated attacker can exploit it remotely via HTTP to compromise the system, leading to unauthorized data access or modification and potential denial-of-service conditions.

Detection Guidance

This vulnerability affects Oracle Database Server Portable Clusterware versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. Detection requires checking the installed version against these ranges. Use Oracle's tools like SQL*Plus to query the database version or check the Oracle Clusterware logs for unusual HTTP access patterns or crashes.

Impact Analysis

If exploited, this vulnerability allows attackers to create, delete, or modify critical data in the Portable Clusterware. It can also cause system crashes or repeated downtime, severely disrupting database operations and availability.

Compliance Impact

This vulnerability allows unauthorized modification or deletion of critical data and can cause system crashes, which directly impacts data integrity and availability. For GDPR, this could lead to unauthorized access or loss of personal data, violating principles of integrity and confidentiality. For HIPAA, it risks unauthorized alteration or destruction of protected health information, compromising compliance with security and privacy requirements.

Mitigation Strategies

Apply the latest Oracle Critical Patch Update immediately to address the Portable Clusterware vulnerability. Ensure network access via HTTP is restricted to trusted sources only. Monitor for unusual activity in the Portable Clusterware components.

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