CVE-2026-29108: SuiteCRM Information Disclosure Flaw

CVE-2026-29108 Overview

CVE-2026-29108 is an Information Disclosure vulnerability affecting SuiteCRM, an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to version 8.9.3, an authenticated API endpoint allows any user to retrieve detailed information about any other user, including their password hash, username, and MFA configuration. As any authenticated user can query this endpoint, it's possible to retrieve and potentially crack the passwords of administrative users, leading to privilege escalation and full system compromise.

Critical Impact

Any authenticated user can extract sensitive user data including password hashes and MFA configurations, enabling offline password cracking attacks against administrative accounts.

Affected Products

• SuiteCRM versions prior to 8.9.3
• SuiteCRM-Core (all installations with authenticated API access)
• SuiteCRM deployments with exposed API endpoints

Discovery Timeline

• 2026-03-20 - CVE CVE-2026-29108 published to NVD
• 2026-03-23 - Last updated in NVD database

Technical Details for CVE-2026-29108

Vulnerability Analysis

This vulnerability represents a classic Insecure Direct Object Reference (IDOR) combined with improper access control on the SuiteCRM API. The affected endpoint fails to implement proper authorization checks, allowing any authenticated user—regardless of their role or permissions—to query detailed information about other users in the system.

The vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The exposed data includes highly sensitive fields such as password hashes, usernames, and Multi-Factor Authentication (MFA) configurations. The exposure of password hashes is particularly dangerous as it enables offline brute-force or dictionary attacks against user credentials without triggering any rate limiting or account lockout mechanisms.

The attack requires network access and low-privilege authentication, meaning any user with valid credentials can exploit this vulnerability. While no integrity or availability impact exists, the confidentiality impact is significant due to the sensitive nature of the exposed data.

Root Cause

The root cause of this vulnerability is insufficient authorization validation on the user information API endpoint. The endpoint appears to verify that a user is authenticated but fails to check whether the requesting user has the appropriate permissions to access another user's detailed information. This missing authorization check violates the principle of least privilege and allows horizontal privilege escalation through data access.

Attack Vector

The attack vector is network-based and requires low-privilege authentication to execute. An attacker with any valid SuiteCRM user account can exploit this vulnerability by making API requests to the vulnerable endpoint, specifying target user identifiers to retrieve their sensitive information.

The attack flow typically follows these steps:

1. The attacker authenticates to SuiteCRM using any valid user credentials
2. The attacker identifies or enumerates user IDs within the system
3. The attacker queries the vulnerable API endpoint with target user IDs
4. The API returns detailed user information including password hashes
5. The attacker performs offline password cracking against administrative hashes
6. Upon successful crack, the attacker can escalate to administrative access

The vulnerability requires no user interaction and can be exploited programmatically to enumerate and extract all user data from the system. For technical details, refer to the SuiteCRM Security Advisory.

Detection Methods for CVE-2026-29108

Indicators of Compromise

• Unusual API request patterns targeting user information endpoints from low-privilege accounts
• High-volume API queries for user data from single authenticated sessions
• Sequential or bulk user ID enumeration patterns in API logs
• Authentication attempts using previously compromised administrative credentials

Detection Strategies

• Monitor API access logs for user information endpoint requests from non-administrative accounts
• Implement anomaly detection for unusual patterns of user data retrieval
• Review authentication logs for successful logins following periods of API enumeration activity
• Deploy web application firewall rules to detect and alert on bulk user information queries

Monitoring Recommendations

• Enable detailed API logging for all user-related endpoints
• Configure alerts for requests to user information endpoints from non-administrative IP addresses or accounts
• Implement rate limiting monitoring to detect enumeration attempts
• Regularly audit user accounts for signs of compromise following exploitation

How to Mitigate CVE-2026-29108

Immediate Actions Required

• Upgrade SuiteCRM to version 8.9.3 or later immediately
• Review API access logs for evidence of prior exploitation
• Force password resets for all users, prioritizing administrative accounts
• Audit MFA configurations to ensure they have not been tampered with

Patch Information

SuiteCRM has released version 8.9.3 which addresses this vulnerability by implementing proper authorization checks on the affected API endpoint. The patch ensures that users can only retrieve information about themselves unless they have explicit administrative permissions.

For detailed patch information and upgrade instructions, refer to the SuiteCRM Security Advisory on GitHub.

Workarounds

• Restrict API access at the network level using firewall rules or reverse proxy configurations
• Implement additional authentication layers (VPN, IP allowlisting) for API access
• Temporarily disable API access for non-essential users until patching is complete
• Deploy a web application firewall with rules to block unauthorized user information requests

# Example: Restrict API access via Apache configuration
<Location "/api/v8/module/Users">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Location>