CVE-2026-26977 in LMS
Summary
by MITRE • 02/20/2026
Frappe Learning Management System (LMS) is a learning system that helps users structure their content. In versions 2.44.0 and below, unauthorized users are able to access the details of unpublished courses via API endpoints. A fix for this issue is planned for the 2.45.0 release.
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Analysis
by VulDB Data Team • 02/22/2026
The vulnerability identified as CVE-2026-26977 affects the Frappe Learning Management System LMS platform, specifically impacting versions 2.44.0 and earlier. This security flaw represents a critical access control weakness that undermines the system's integrity and confidentiality mechanisms. The issue manifests through API endpoints that fail to properly validate user authorization before exposing sensitive course information, creating a significant risk for organizations relying on the platform for educational content management.
The technical implementation flaw stems from inadequate authentication and authorization checks within the API layer of the LMS system. When users make requests to retrieve course details through the application programming interface, the system does not sufficiently verify whether the requesting user possesses proper permissions to access unpublished content. This weakness allows any authenticated user, regardless of their role or privileges, to obtain information about courses that have not yet been published or made available to the general public. The vulnerability directly maps to CWE-284, which describes improper access control issues, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential access through API exploitation.
The operational impact of this vulnerability extends beyond simple information disclosure, as it potentially compromises the entire learning content management process. Unauthorized users could access draft course materials, syllabi, instructor notes, and other unpublished educational resources that may contain sensitive information or represent intellectual property. This exposure creates risks for organizations with strict content control policies, particularly in academic institutions, corporate training environments, or any setting where content confidentiality is paramount. The vulnerability also undermines trust in the platform's security model and could lead to reputational damage if unauthorized access to sensitive educational materials occurs.
Organizations utilizing Frappe LMS versions 2.44.0 or earlier should immediately implement mitigations while awaiting the official 2.45.0 release that will contain the proper fix. The recommended approach includes enforcing stricter API endpoint access controls, implementing comprehensive role-based access control mechanisms, and conducting thorough security testing of all API interfaces. Security teams should also consider implementing network-level restrictions to limit API access to trusted IP addresses and establish monitoring procedures to detect unauthorized access attempts. Additionally, administrators should review and audit existing user permissions to ensure that only authorized personnel can access unpublished course materials, while also preparing for the mandatory upgrade to version 2.45.0 to fully resolve the vulnerability.