CVE-2026-109613 in ERPNext
Summary
by MITRE • 10/13/2026
Frappe ERPNext before 15.121.0 and 16.x before 16.34.0 contains a missing authorization vulnerability in which certain endpoints fail to enforce proper authorization checks on document status modification. Authenticated low-privileged users can call these endpoints to modify data beyond their permitted role, bypassing intended role-based access restrictions.
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Analysis
by VulDB Data Team • 10/13/2026
The identified security flaw represents a critical failure in the implementation of Role-Based Access Control within Frappe ERPNext versions prior to 15.121.0 and 16.x prior to 16.34.0. This vulnerability stems from an insufficient authorization check mechanism embedded within specific API endpoints responsible for modifying document statuses. In a properly secured enterprise resource planning system, the integrity of data is maintained by ensuring that users can only perform actions on resources if their assigned role explicitly permits such operations. However, in this instance, the backend logic fails to validate whether the authenticated user possesses the necessary privileges before allowing changes to the status field of various documents. This oversight creates a direct path for privilege escalation, where an attacker with low-level access rights can manipulate system state beyond their authorized scope.
From a technical perspective, the vulnerability allows authenticated users who are not granted administrative or specific high-privilege roles to invoke endpoints that update document statuses without triggering appropriate permission checks. Typically, status modifications in ERP systems carry significant operational weight, as they often trigger downstream workflows, financial calculations, or inventory adjustments. By bypassing these controls, a low-privileged user can effectively assume the capabilities of higher-privileged accounts for specific actions. This type of flaw is characteristic of insecure direct object references combined with broken access control mechanisms, where the system trusts client-side inputs or session data without rigorous server-side validation against the user's permission matrix. The absence of these checks means that the application logic proceeds to execute the status change regardless of the caller's actual role permissions.
The operational impact of this vulnerability is substantial for organizations relying on ERPNext for critical business processes. An attacker exploiting this flaw could alter the state of sales orders, purchase invoices, or inventory records without authorization. This capability undermines data integrity and audit trails, as actions are recorded under a low-privileged account but executed with elevated effects. For financial modules, changing an invoice status from draft to submitted might prematurely trigger revenue recognition processes that should only occur after managerial approval. In supply chain contexts, modifying stock levels or shipment statuses could lead to inventory discrepancies, fulfillment errors, and logistical failures. Furthermore, the ability to bypass role-based restrictions erodes trust in the system's security model, potentially leading to compliance violations if audit logs do not accurately reflect who initiated critical changes versus what permissions were actually required for those actions.
This vulnerability aligns with CWE-269, which classifies Improper Privilege Management, specifically highlighting cases where an actor is granted privileges that exceed their assigned role or security clearance. Additionally, the exploitation technique maps to MITRE ATT&CK techniques related to privilege escalation and unauthorized access, such as T1078 Valid Accounts when combined with lateral movement if further exploits are chained. The core issue lies in the failure of the authorization layer to enforce separation of duties effectively during state transitions within document lifecycles.
To mitigate this risk, organizations must immediately apply the official patches provided by Frappe for versions 15.121.0 and above, as well as version 16.34.0 and later for the 16.x branch. These updates include corrected authorization logic that properly validates user permissions before processing status modification requests. Until patching is complete, administrators should implement compensating controls such as strict network segmentation to limit access to ERPNext instances from untrusted networks. Additionally, deploying Web Application Firewalls with rules designed to detect anomalous API usage patterns may help identify attempts to exploit this flaw by monitoring for unauthorized calls to sensitive endpoints. Regular security audits and penetration testing focused on role-based access control should be conducted to ensure that no other similar gaps exist within the application's permission structure.