CVE-2026-0948
📋 TL;DR
This CVE describes an authentication bypass vulnerability in Drupal's Microsoft Entra ID SSO Login module that allows attackers to access privileged functionality without proper credentials. The vulnerability affects all Drupal sites using this module from version 0.0.0 up to (but not including) 1.0.4. Attackers can exploit this to gain unauthorized access and potentially escalate privileges on affected Drupal installations.
💻 Affected Systems
- Drupal Microsoft Entra ID SSO Login module
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to the Drupal site, allowing them to modify content, install malicious modules, access sensitive data, or take full control of the system.
Likely Case
Unauthorized users bypass authentication to access privileged areas of the site, potentially viewing sensitive information or performing actions reserved for authenticated users.
If Mitigated
With proper network segmentation and monitoring, unauthorized access attempts are detected and blocked before significant damage occurs.
🎯 Exploit Status
Authentication bypass vulnerabilities typically require minimal technical skill to exploit once the attack vector is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.4
Vendor Advisory: https://www.drupal.org/sa-contrib-2026-005
Restart Required: No
Instructions:
1. Update the Microsoft Entra ID SSO Login module to version 1.0.4 or later via Drupal's update manager. 2. Clear Drupal caches. 3. Verify the update was successful by checking the module version.
🔧 Temporary Workarounds
Disable the vulnerable module
allTemporarily disable the Microsoft Entra ID SSO Login module until patching is possible
drush pm-disable microsoft_entra_id_sso_login
Implement additional authentication controls
allAdd IP-based restrictions or additional authentication layers to the affected paths
🧯 If You Can't Patch
- Implement network-level access controls to restrict access to the Drupal admin interface
- Enable detailed logging and monitoring for authentication attempts and privilege escalation events
🔍 How to Verify
Check if Vulnerable:
Check the installed version of the Microsoft Entra ID SSO Login module in Drupal's Extend page or via drush: drush pm-list | grep microsoft_entra_id_sso_loginCheck Version:
drush pm-list --fields=name,version | grep microsoft_entra_id_sso_loginVerify Fix Applied:
Verify the module version is 1.0.4 or higher and test authentication flows to ensure proper access controls are enforced📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns
- Access to admin pages from unexpected IPs or users
- Failed authentication attempts followed by successful privileged access
Network Indicators:
- HTTP requests bypassing authentication endpoints
- Unusual traffic patterns to admin URLs
SIEM Query:
source="drupal_access_log" AND (uri_path="/admin*" OR uri_path="/user*" OR status_code=403) AND NOT user_agent="crawler" | stats count by src_ip, uri_path