CVE-2026-101507: Oracle Trusted Answer Search Disclosure

CVE-2026-101507 Overview

CVE-2026-101507 affects the PL/SQL package component of Oracle Trusted Answer Search version 26.1. The vulnerability allows a low-privileged attacker with network access over HTTP to compromise confidentiality of the application. Successful exploitation grants unauthorized access to critical data or complete read access to all data accessible through Oracle Trusted Answer Search. Oracle disclosed the issue in the October 2026 Critical Patch Update. The flaw does not affect integrity or availability, but confidentiality impact is rated high.

Critical Impact
An authenticated attacker with low privileges can remotely read all data accessible to Oracle Trusted Answer Search, including potentially sensitive query content and indexed records.

Affected Products

Oracle Trusted Answer Search 26.1
PL/SQL package component within Oracle Trusted Answer Search
Deployments exposing the application over HTTP to authenticated users

Discovery Timeline

2026-10-20 - CVE-2026-101507 published to the National Vulnerability Database
2026-10-21 - Last updated in NVD database
October 2026 - Addressed in the Oracle Critical Patch Update advisory

Technical Details for CVE-2026-101507

Vulnerability Analysis

The vulnerability resides in a PL/SQL package used by Oracle Trusted Answer Search. PL/SQL packages encapsulate stored procedures, functions, and variables executed inside the Oracle Database engine. A flaw in this package allows a network-reachable attacker holding valid low-privileged credentials to bypass intended data access restrictions.

The attack is delivered over HTTP, indicating the vulnerable PL/SQL routine is exposed through a web-facing interface of the application. Exploitation requires no user interaction and no elevated privileges. According to Oracle's advisory, successful exploitation results in unauthorized read access to all data accessible by the application.

The issue is categorized as an information disclosure flaw. Only confidentiality is affected; the vulnerability does not permit data modification or service disruption. The scope remains unchanged, meaning the impact is confined to the vulnerable component's security authority.

Root Cause

Oracle has not published detailed root-cause analysis. Based on the advisory metadata, the issue stems from improper access control or missing authorization checks within a PL/SQL routine invoked through the HTTP interface. The package likely returns data without validating whether the calling session is authorized to view the requested records.

Attack Vector

The attack vector is network-based over HTTP. An attacker needs valid low-privileged credentials to Oracle Trusted Answer Search. After authenticating, the attacker issues crafted HTTP requests that invoke the vulnerable PL/SQL package, retrieving data outside the attacker's authorization boundary. No social engineering or client-side interaction is required.

The vulnerability mechanism is described in prose because no verified public proof-of-concept exists. Refer to the Oracle October 2026 Security Alert for the authoritative advisory.

Detection Methods for CVE-2026-101507

Indicators of Compromise

Unusual volume of HTTP requests from a low-privileged user account targeting Oracle Trusted Answer Search endpoints
Database audit records showing one session accessing data sets inconsistent with the user's role
PL/SQL package invocations originating from unexpected source IP addresses or outside normal business hours

Detection Strategies

Enable Oracle Database fine-grained auditing on the PL/SQL packages used by Trusted Answer Search
Alert on authenticated users retrieving record counts significantly above their historical baseline
Correlate web server access logs with database audit trails to identify request patterns tied to abnormal data access

Monitoring Recommendations

Forward Oracle Database audit logs and application HTTP logs to a central analytics platform for correlation
Monitor for repeated access to sensitive indexed content by non-administrative accounts
Track changes in query response size per user session to flag bulk data extraction attempts

How to Mitigate CVE-2026-101507

Immediate Actions Required

Apply the fixes delivered in the Oracle October 2026 Critical Patch Update for Oracle Trusted Answer Search 26.1
Audit accounts with access to Trusted Answer Search and remove unused or over-privileged credentials
Rotate credentials for accounts that may have been exposed prior to patching
Restrict HTTP access to the application to trusted network segments where feasible

Patch Information

Oracle addressed CVE-2026-101507 in the October 2026 Critical Patch Update. Administrators should review the Oracle October 2026 Security Alert for patch identifiers and installation instructions specific to Oracle Trusted Answer Search 26.1.

Workarounds

Place the application behind a reverse proxy or web application firewall enforcing strict authentication and rate limiting
Limit database privileges granted to the application service account using the principle of least privilege
Disable or restrict access to the vulnerable PL/SQL package endpoints until patching is complete, if operationally feasible

bash

# Example: enable fine-grained auditing on a PL/SQL package in Oracle Database
BEGIN
  DBMS_FGA.ADD_POLICY(
    object_schema   => 'TAS_OWNER',
    object_name     => 'TAS_SEARCH_PKG',
    policy_name     => 'TAS_SEARCH_AUDIT',
    statement_types => 'SELECT,EXECUTE',
    audit_trail     => DBMS_FGA.DB_EXTENDED
  );
END;
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