CVE-2026-3210: Drupal Material Icons Auth Bypass Flaw

CVE-2026-3210 Overview

An Incorrect Authorization vulnerability exists in the Drupal Material Icons module that allows attackers to perform Forceful Browsing attacks. This vulnerability stems from improper access control mechanisms (CWE-863) that fail to properly validate user authorization before granting access to protected resources.

Critical Impact

Attackers can bypass authorization controls to access restricted resources or functionality within Drupal sites running vulnerable versions of the Material Icons module, potentially leading to unauthorized data access or modification.

Affected Products

• Drupal Material Icons versions 0.0.0 through 2.0.3

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-3210 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-3210

Vulnerability Analysis

This vulnerability is classified as Incorrect Authorization (CWE-863), which occurs when the Drupal Material Icons module fails to properly verify that a user is authorized to access a resource or perform an action. The flaw enables Forceful Browsing attacks, where an attacker can directly access URLs or resources that should be restricted based on authorization rules.

The vulnerability is exploitable over the network without requiring authentication or user interaction. While the confidentiality impact is limited, the integrity of the system can be compromised as unauthorized modifications may be possible. Organizations running affected versions of the Material Icons module should prioritize remediation.

Root Cause

The root cause lies in insufficient authorization checks within the Material Icons module. The module fails to properly validate user permissions before allowing access to certain resources or endpoints. This creates a condition where attackers can directly navigate to restricted URLs or manipulate request parameters to bypass intended access controls.

Attack Vector

Forceful Browsing is the primary attack vector for this vulnerability. An attacker can exploit this by:

1. Directly accessing URLs that should be protected by authorization controls
2. Manipulating request parameters to access resources intended for authorized users only
3. Enumerating accessible endpoints to discover and access restricted functionality

Since this is a network-based attack requiring no privileges or user interaction, attackers can remotely probe and exploit vulnerable Drupal installations. The vulnerability allows unauthorized changes to be made, though it does not directly expose confidential data or cause service disruption.

Detection Methods for CVE-2026-3210

Indicators of Compromise

• Unusual access patterns to Material Icons module endpoints from unauthorized sources
• HTTP requests attempting to directly access administrative or restricted paths within the module
• Access logs showing successful requests to protected resources from unauthenticated sessions
• Unexpected modifications to icon configurations or module settings

Detection Strategies

• Monitor web server access logs for requests to Material Icons module paths without proper authentication
• Implement web application firewall (WAF) rules to detect and block forceful browsing attempts
• Review Drupal watchdog logs for authorization failures or unexpected access patterns
• Enable detailed logging for the Material Icons module to capture suspicious activity

Monitoring Recommendations

• Configure alerting for repeated access attempts to restricted module endpoints
• Implement anomaly detection for unusual navigation patterns within the Drupal admin interface
• Establish baseline access patterns and alert on deviations that may indicate exploitation attempts

How to Mitigate CVE-2026-3210

Immediate Actions Required

• Upgrade the Drupal Material Icons module to version 2.0.4 or later immediately
• Review access logs for any indicators of exploitation or unauthorized access
• Audit current module permissions and ensure proper access controls are in place
• Consider temporarily disabling the Material Icons module if immediate patching is not possible

Patch Information

The vulnerability has been addressed in Material Icons version 2.0.4. Organizations should update to this version or later to remediate the vulnerability. For detailed patch information and upgrade instructions, refer to the Drupal Security Advisory.

Workarounds

• Restrict access to the Material Icons module administrative paths at the web server level using .htaccess or server configuration
• Implement additional authorization checks at the reverse proxy or WAF layer
• Limit access to the Drupal admin interface to trusted IP addresses
• Disable the Material Icons module entirely until the patch can be applied

# Example: Restrict access to module paths via .htaccess
<Directory "/path/to/drupal/modules/material_icons">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Directory>