CVE-2026-81162: Drupal DXPR Builder Data Exposure Flaw

CVE-2026-81162 Overview

CVE-2026-81162 is an information disclosure vulnerability in the Drupal DXPR Builder module, marketed as "The Best Editing (AI) Experience for Drupal." The flaw allows unauthenticated attackers to access sensitive information through forceful browsing. The issue is categorized under [CWE-201]: Insertion of Sensitive Information Into Sent Data. All DXPR Builder versions from 0.0.0 through 2.8.1 are affected. The vulnerability is exploitable over the network without user interaction or authentication.

Critical Impact
Remote unauthenticated attackers can enumerate protected resources and retrieve sensitive data returned by DXPR Builder responses, exposing configuration or content that should require authorization.

Affected Products

Drupal DXPR Builder module versions 0.0.0 through 2.8.1
Drupal sites with DXPR Builder installed and enabled
Any environment relying on DXPR Builder access controls to protect editor resources

Discovery Timeline

2026-09-02 - CVE-2026-81162 published to NVD
2026-09-02 - Last updated in NVD database

Technical Details for CVE-2026-81162

Vulnerability Analysis

The vulnerability stems from DXPR Builder including sensitive information in HTTP responses that should be restricted. Because access controls do not properly gate the affected endpoints, an attacker can directly request protected resources by guessing or enumerating URLs. This class of weakness is known as forceful browsing.

The scope is limited to confidentiality. The vulnerability does not enable modification of data or disruption of service. However, disclosed information may support follow-on attacks such as credential targeting or reconnaissance for privilege escalation attempts against the Drupal site.

Root Cause

The root cause is [CWE-201]: Insertion of Sensitive Information Into Sent Data. DXPR Builder endpoints return content without enforcing authorization checks appropriate to the sensitivity of the data. Users who should not have access to internal builder resources can retrieve them by requesting the URL directly.

Attack Vector

An unauthenticated remote attacker sends crafted HTTP requests to Drupal endpoints exposed by DXPR Builder. No user interaction, privileges, or prior access are required. Because the attack requires only network reachability to the Drupal site, publicly accessible installations are directly exposed.

No verified public exploit code is available. Refer to the Drupal Security Advisory for technical details published by the maintainers.

Detection Methods for CVE-2026-81162

Indicators of Compromise

Unauthenticated HTTP GET requests to DXPR Builder module paths returning 200 OK with content payloads
Sequential URL enumeration patterns targeting /dxpr or related builder endpoints in web server access logs
Unusual volumes of requests from single source IPs to Drupal admin-adjacent paths

Detection Strategies

Review web server and Drupal access logs for anonymous sessions accessing DXPR Builder routes
Correlate response sizes on DXPR endpoints; large responses to unauthenticated clients warrant investigation
Deploy Web Application Firewall (WAF) rules to alert on requests to DXPR paths lacking authentication cookies or tokens

Monitoring Recommendations

Ingest Drupal, Apache, and Nginx logs into a centralized log platform for anonymous-request analytics
Alert on spikes in 4xx and 2xx responses from DXPR routes indicating enumeration attempts
Track outbound data volume from Drupal endpoints to identify bulk retrieval of sensitive responses

How to Mitigate CVE-2026-81162

Immediate Actions Required

Inventory Drupal deployments and identify installations running DXPR Builder version 2.8.1 or earlier
Upgrade DXPR Builder to a fixed release published after version 2.8.1 per the vendor advisory
Restrict network access to Drupal administrative and builder endpoints through IP allowlisting or VPN gating
Rotate any credentials, tokens, or API keys that may have been exposed through DXPR responses

Patch Information

Apply the fixed release referenced in the Drupal Security Advisory. Verify the deployed module version through the Drupal admin interface or by inspecting the module .info.yml file after upgrade.

Workarounds

Disable the DXPR Builder module on affected sites until the patched version is deployed
Place DXPR routes behind an authenticating reverse proxy or WAF rule that blocks anonymous access
Apply Drupal role and permission restrictions to limit exposure of editor endpoints to authenticated users only

bash

# Verify DXPR Builder version via Drush
drush pm:list --status=enabled --filter=dxpr_builder

# Update DXPR Builder to the fixed release
composer update drupal/dxpr_builder --with-dependencies
drush updatedb -y
drush cache:rebuild