CVE-2026-7891

Vulnerability

Overview

The CVE describes a critical authorization misconfiguration in VerySecureApp, an application built with Mendix Studio Pro 11.8.0 Beta. The root cause is that the anonymous user role for the MyFirstModule entity inherits access rights by default, despite no explicit permissions being configured. Mendix Studio Pro silently enables this inheritance without clear documentation, leading to unintended data exposure for any entity made publicly accessible [1].

Exploitation

Scenario

No exploit is required. An attacker can leverage anonymous access to the Mendix application—simply browsing to it without authentication—and query the runtime (e.g., via /xas endpoints) to retrieve all records from the misconfigured entity. This attack is scalable and hard to detect because it uses normal Mendix runtime requests to fetch data that was unintentionally made public [1].

Impact

Successful exploitation allows anonymous users to read all stored records in the affected entity. Depending on the application, this could expose sensitive personal data (names, addresses, contact details, internal records, documents, ID images), leading to privacy violations, GDPR breach notification requirements, fraud, phishing, and reputational damage [1].

Mitigation

Organizations using Mendix should immediately review authorization configurations for anonymous user roles. Correct the entity access rules, role mappings, and XPath constraints to ensure that the anonymous role only has access to explicitly intended data. The minimum recommended action is to verify that no anonymous role inheritance is active unless explicitly needed and documented [1].