CVE-2026-76211: phpMyFAQ Auth Bypass Vulnerability

CVE-2026-76211 Overview

CVE-2026-76211 is a missing authorization vulnerability in phpMyFAQ before version 4.1.7. The application fails to enforce the CONFIGURATION_EDIT permission on several administrative API read endpoints. Any authenticated user, regardless of privilege level, can query configuration data for Lightweight Directory Access Protocol (LDAP), Elasticsearch, OpenSearch, and the administrative dashboard. Retrievable data includes LDAP server topology, bind account names, search bases, search index statistics, and site analytics. The issue is classified under CWE-862: Missing Authorization.

Critical Impact
Any authenticated phpMyFAQ user can retrieve sensitive administrative configuration, including LDAP bind identities and search index metadata, enabling reconnaissance for follow-on attacks.

Affected Products

phpMyFAQ versions prior to 4.1.7
Deployments exposing the phpMyFAQ admin API to authenticated non-admin accounts
Instances integrated with LDAP, Elasticsearch, or OpenSearch backends

Discovery Timeline

2026-08-19 - CVE-2026-76211 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-76211

Vulnerability Analysis

phpMyFAQ exposes administrative REST endpoints under its admin API surface. These endpoints return configuration state for LDAP integration, search backends such as Elasticsearch and OpenSearch, and the administrator dashboard analytics view. The application authenticates the caller but does not verify that the caller holds the CONFIGURATION_EDIT permission before returning data. Any low-privilege user with a valid session can therefore read the responses.

The disclosed data supports adversary reconnaissance. LDAP topology and bind account names identify directory servers and service accounts worth targeting. Search bases reveal organizational unit structure. Elasticsearch and OpenSearch statistics expose index names, document counts, and cluster identifiers. Dashboard analytics reveal traffic patterns and content usage.

Root Cause

The root cause is a missing authorization check on read paths of admin API controllers. Authentication is enforced but role-based access control is not applied to the affected GET handlers. The write paths correctly verify CONFIGURATION_EDIT, but the corresponding read paths were omitted from the permission gate.

Attack Vector

The attack requires network access to the phpMyFAQ instance and valid credentials for any account. An attacker registers or reuses a low-privilege account, authenticates, and issues HTTP requests to the vulnerable admin API endpoints for LDAP, Elasticsearch, OpenSearch, and dashboard configuration. The endpoints return JSON payloads containing configuration data that should be restricted to administrators.

No exploitation code is required beyond standard HTTP tooling. Refer to the GitHub Security Advisory GHSA-7gh7-qh7c-9r8m for endpoint-level detail.

Detection Methods for CVE-2026-76211

Indicators of Compromise

Authenticated HTTP GET requests from non-administrator accounts to phpMyFAQ admin API paths for LDAP, Elasticsearch, OpenSearch, or dashboard configuration
Session identifiers belonging to standard users appearing in web server logs alongside /admin/api/ request paths
Unexpected JSON responses containing ldapServer, bindDN, searchBase, or index statistics fields returned to non-admin sessions

Detection Strategies

Correlate web access logs with the phpMyFAQ user role table to flag admin API access by accounts lacking CONFIGURATION_EDIT
Deploy web application firewall rules that restrict admin API routes to source IP ranges or user roles used by administrators
Alert on bursts of sequential requests to multiple admin configuration endpoints from a single session, which indicates enumeration

Monitoring Recommendations

Enable verbose access logging on the phpMyFAQ web tier and forward logs to a centralized SIEM for role-aware correlation
Baseline normal admin API request volume and alert on deviations from non-administrator source accounts
Monitor LDAP and search cluster logs for probing that follows disclosure of configuration data

How to Mitigate CVE-2026-76211

Immediate Actions Required

Upgrade phpMyFAQ to version 4.1.7 or later, which enforces CONFIGURATION_EDIT on the affected read endpoints
Audit existing user accounts and disable dormant or unnecessary authenticated accounts on the phpMyFAQ instance
Rotate LDAP bind account credentials if logs indicate the LDAP configuration endpoint was accessed by non-admin users

Patch Information

The vendor released a fix in phpMyFAQ 4.1.7. Details are published in the GitHub Security Advisory GHSA-7gh7-qh7c-9r8m and the VulnCheck Advisory. The patch adds the missing permission check on the affected admin API GET handlers.

Workarounds

Restrict access to admin API paths at the reverse proxy or web server layer to administrator source addresses until the upgrade is applied
Disable self-registration and require administrator approval for new accounts to reduce the pool of authenticated attackers
Segment the phpMyFAQ deployment so that its LDAP and search backends are not reachable from untrusted networks

bash

# Example nginx restriction limiting admin API paths to an internal CIDR
location ~ ^/admin/api/(ldap|elasticsearch|opensearch|dashboard) {
    allow 10.10.0.0/24;
    deny all;
    proxy_pass http://phpmyfaq_backend;
}