CVE-2026-76215 Overview
CVE-2026-76215 is a missing authorization vulnerability in phpMyFAQ versions before 4.1.7. The application fails to apply parent FAQ visibility checks before returning child resources through its API. Unauthenticated attackers can query the comments and attachments API endpoints to retrieve data associated with restricted FAQ records. Exposed data includes comment text, commenter email addresses, and attachment filenames for FAQs the attacker cannot directly access. The flaw maps to [CWE-862] (Missing Authorization) and affects confidentiality of restricted FAQ content.
Critical Impact
Remote unauthenticated attackers can enumerate comments, commenter email addresses, and attachment filenames tied to non-public FAQ entries by directly querying child-resource API endpoints.
Affected Products
- phpMyFAQ versions prior to 4.1.7
- phpMyFAQ comments API endpoint
- phpMyFAQ attachments API endpoint
Discovery Timeline
- 2026-08-19 - CVE-2026-76215 published to NVD
- 2026-08-19 - Last updated in NVD database
Technical Details for CVE-2026-76215
Vulnerability Analysis
phpMyFAQ enforces visibility and access controls at the parent FAQ record level. Child resources such as comments and attachments inherit their access context from the parent FAQ entry. In versions before 4.1.7, the API endpoints that return child resources do not re-check the parent FAQ's visibility state before serving data. An unauthenticated HTTP request to the comments or attachments endpoints therefore returns records that belong to FAQs the caller has no authorization to view.
The consequence is an authorization bypass that exposes commenter email addresses, comment bodies, and attachment metadata. Attackers can enumerate FAQ identifiers and harvest data from internal or restricted knowledge base content. The disclosed information supports follow-on phishing, social engineering, and reconnaissance against the affected organization.
Root Cause
The root cause is a missing authorization check in the code paths that serve child resources. Access control logic is implemented on the FAQ record retrieval flow, but the comments and attachments endpoints resolve records directly by identifier without consulting the parent FAQ's permission state. This is a classic broken access control pattern tracked under [CWE-862].
Attack Vector
The attack requires only network access to the phpMyFAQ instance. No authentication, user interaction, or elevated privileges are needed. An attacker sends crafted requests to the comments or attachments API endpoints, referencing FAQ identifiers that may be non-public. The server returns the associated child records regardless of the parent's visibility settings.
No public proof-of-concept exploit is available. Refer to the GitHub Security Advisory and the VulnCheck Advisory for advisory details.
Detection Methods for CVE-2026-76215
Indicators of Compromise
- Repeated unauthenticated requests to phpMyFAQ comments API endpoints iterating through sequential FAQ identifiers.
- Unauthenticated requests to attachments API endpoints returning 200 OK responses for records that belong to restricted FAQs.
- Access log spikes from a single source IP enumerating child-resource endpoints without a preceding authenticated session.
Detection Strategies
- Inspect web server access logs for high-volume GET requests against phpMyFAQ comments and attachments API routes without associated authentication cookies or tokens.
- Alert on API responses that return commenter email addresses or attachment metadata to sessions without a valid FAQ read event for the same identifier.
- Correlate outbound response sizes on child-resource endpoints to detect scraping behavior consistent with mass enumeration.
Monitoring Recommendations
- Enable verbose logging on the phpMyFAQ API layer and forward events to a centralized log platform for correlation.
- Monitor for anomalous enumeration patterns targeting FAQ identifier ranges within short time windows.
- Track upgrade status of phpMyFAQ deployments across the environment to confirm remediation coverage.
How to Mitigate CVE-2026-76215
Immediate Actions Required
- Upgrade phpMyFAQ to version 4.1.7 or later on all instances.
- Rotate any commenter email lists or attachment references that may have been exposed if scraping activity is suspected.
- Restrict network exposure of non-public phpMyFAQ deployments behind authenticated reverse proxies or VPN gateways.
Patch Information
The vendor released a fix in phpMyFAQ 4.1.7 that applies parent FAQ visibility checks before returning child resources through the comments and attachments API endpoints. Consult the GitHub Security Advisory for release details and upgrade guidance.
Workarounds
- Block unauthenticated access to /api/v3.0/comments and /api/v3.0/attachments routes at the reverse proxy or web application firewall until the upgrade is complete.
- Restrict the phpMyFAQ instance to authenticated internal users through network segmentation while patching is scheduled.
- Temporarily disable comment and attachment features on FAQ entries that must remain restricted.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
