CVE-2026-7891

Deferred Deferred - Pending Action

Unauthorized Data Exposure in VerySecureApp via Mendix Studio Pro

Publication date: 2026-05-07

Last updated on: 2026-07-14

Assigner: Dutch Institute for Vulnerability Disclosure

Description

A vulnerability has been identified in Mendix Runtime (All versions). Mendix documentation for access rules does not adequately describe the special behavior of the System.User entity, leaving developers without sufficient guidance to configure access rules securely. This documentation gap may lead application developers to unknowingly apply overly permissive access rules to System.User, resulting in unintended exposure of sensitive user data or privilege escalation within deployed Mendix applications.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-07

Last Modified

2026-07-14

Generated

2026-07-29

AI Q&A

2026-05-08

EPSS Evaluated

2026-07-28

NVD

CVE-2026-7891

EUVD

EUVD-2026-28463

Affected Vendors & Products

Vendor	Product	Version / Range
divd	verysecureapp	*
mendix	mendix_studio_pro	to 11.8.0_beta (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-277	A product defines a set of insecure permissions that are inherited by objects that are created by the program.

Attack-Flow Graph

Executive Summary

The vulnerability in VerySecureApp, created using Mendix Studio Pro 11.8.0 Beta, is due to an authorization misconfiguration. Specifically, anonymous users assigned the anonymous user role in the MyFirstModule can access all stored records, even though no explicit access rights are configured for that role. This happens because Mendix Studio Pro versions up to 11.8.0 Beta silently apply user inheritance rules to the anonymous user role without documenting this behavior, leading to unintended data exposure.

Impact Analysis

This vulnerability can lead to unauthorized data exposure, allowing anonymous users to access all stored records in the affected module. Since no authentication or explicit permissions are required, sensitive or confidential information could be accessed by anyone, potentially leading to data breaches, loss of privacy, and damage to the organization's reputation.

Compliance Impact

The vulnerability in VerySecureApp allows anonymous users to access all stored records due to an authorization misconfiguration. This unintended data exposure can lead to unauthorized access to sensitive personal or protected health information.

Such unauthorized data exposure can result in non-compliance with data protection regulations like GDPR and HIPAA, which require strict access controls and protection of personal and health data.

Mitigation Strategies

To mitigate this vulnerability, ensure that anonymous user roles do not have unintended access rights. Specifically, review and correct the authorization configuration in the VerySecureApp, especially for the MyFirstModule, to prevent anonymous users from accessing all stored records.

Additionally, avoid making Mendix Entities publicly available to anonymous users unless explicitly intended and properly secured.

Consider upgrading Mendix Studio Pro to a version later than 11.8.0 Beta where this issue is addressed or apply any patches provided by the vendor.

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