CVE-2026-3527: Drupal AJAX Dashboard Auth Bypass Flaw

CVE-2026-3527 Overview

CVE-2026-3527 is a Missing Authentication for Critical Function vulnerability (CWE-306) affecting the Drupal AJAX Dashboard module. This security flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized access to critical administrative functions within affected Drupal installations.

The vulnerability stems from the AJAX Dashboard module's failure to properly authenticate requests to critical functions, which can be exploited by remote attackers to bypass access controls and interact with dashboard functionality that should require authentication.

Critical Impact

Unauthenticated attackers may be able to access and manipulate dashboard functionality that should be restricted to authorized users, potentially leading to information disclosure, configuration changes, or further system compromise.

Affected Products

• Drupal AJAX Dashboard versions from 0.0.0 before 3.1.0

Discovery Timeline

• 2026-03-26 - CVE CVE-2026-3527 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-3527

Vulnerability Analysis

This vulnerability is classified under CWE-306 (Missing Authentication for Critical Function), which describes scenarios where a software application does not perform authentication for functionality that requires a provable user identity. In the context of the Drupal AJAX Dashboard module, certain critical functions are exposed without proper authentication checks, allowing unauthenticated users to access functionality that should be restricted.

The AJAX Dashboard module provides interactive dashboard capabilities for Drupal sites. The vulnerable versions fail to implement proper access control verification on AJAX endpoints that handle critical dashboard operations. This means that an attacker who can reach the vulnerable endpoints can interact with them directly without first establishing an authenticated session.

Root Cause

The root cause of this vulnerability is the absence of authentication verification on critical AJAX endpoints within the Drupal AJAX Dashboard module. When the module processes AJAX requests, it fails to validate that the requesting user has been properly authenticated before executing sensitive operations. This is a fundamental access control failure that allows attackers to bypass the intended security model.

The vulnerability exists in versions prior to 3.1.0, indicating that proper authentication checks were introduced in the patched release to address this oversight.

Attack Vector

An attacker can exploit this vulnerability by directly sending crafted HTTP requests to the vulnerable AJAX endpoints. Since authentication is not required, the attacker does not need valid credentials to interact with the exposed functionality.

The exploitation process involves identifying the vulnerable AJAX endpoints exposed by the AJAX Dashboard module and sending properly formatted requests to trigger the critical functions. Because no authentication token or session validation occurs, the requests are processed as if they came from an authorized user.

For technical details on the vulnerability and exploitation vectors, refer to the Drupal Security Advisory.

Detection Methods for CVE-2026-3527

Indicators of Compromise

• Unusual HTTP requests to AJAX Dashboard endpoints from unauthenticated sessions or unexpected IP addresses
• Anomalous dashboard configuration changes without corresponding authenticated user activity in logs
• Unexpected data modifications or access patterns in dashboard-related database tables
• Web server logs showing direct requests to AJAX endpoints without prior authentication

Detection Strategies

• Review web server access logs for requests to AJAX Dashboard endpoints, particularly those lacking authenticated session cookies
• Implement monitoring rules to alert on unauthenticated access attempts to known AJAX Dashboard URL patterns
• Deploy Web Application Firewall (WAF) rules to detect and block suspicious requests targeting Drupal AJAX endpoints
• Conduct regular security audits of Drupal module configurations and access control settings

Monitoring Recommendations

• Enable verbose logging on Drupal installations to capture detailed request information for forensic analysis
• Configure intrusion detection systems (IDS) to monitor for access control bypass attempts against Drupal sites
• Implement real-time alerting for changes to dashboard configurations or user permissions

How to Mitigate CVE-2026-3527

Immediate Actions Required

• Update the Drupal AJAX Dashboard module to version 3.1.0 or later immediately
• Audit current Drupal installations to identify any instances running vulnerable versions (prior to 3.1.0)
• Review access logs for signs of exploitation prior to patching
• Consider temporarily disabling the AJAX Dashboard module if immediate patching is not possible

Patch Information

The vulnerability has been addressed in Drupal AJAX Dashboard version 3.1.0. Site administrators should update to this version or later to remediate the vulnerability. For complete patch details and download information, refer to the Drupal Security Advisory.

Workarounds

• If patching is not immediately possible, disable the AJAX Dashboard module until the update can be applied
• Implement network-level access controls to restrict access to Drupal administrative URLs from trusted IP addresses only
• Deploy WAF rules to block unauthenticated requests to AJAX Dashboard endpoints
• Enable Drupal's built-in access logging to monitor for suspicious activity

# Drupal CLI command to disable the vulnerable module temporarily
drush pm:uninstall ajax_dashboard

# Verify the module is disabled
drush pm:list --type=module | grep ajax_dashboard