CVE-2026-109658 in ERPNext
Summary
by MITRE • 10/13/2026
Frappe ERPNext before 15.115.0 and 16.x before 16.26.0 contains a missing authorization vulnerability in which certain endpoints fail to enforce proper authorization checks. Authenticated users can call these endpoints to read data, including personal data, beyond what their assigned role permits.
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Analysis
by VulDB Data Team • 10/13/2026
The identified security flaw represents a critical breakdown in access control mechanisms within the Frappe ERPNext framework, specifically affecting versions prior to 15.115.0 and 16.x prior to 16.26.0. This vulnerability is classified as an Insecure Direct Object Reference or Broken Access Control issue, where the application fails to verify whether the authenticated user has sufficient privileges to access specific resources. The core technical deficiency lies in the server-side logic governing certain API endpoints and internal routes, which rely on incomplete authorization checks that do not adequately validate the relationship between the requesting user's assigned role and the data being accessed. Consequently, an attacker who possesses valid credentials for a low-privilege account can manipulate request parameters to target resources reserved for administrators or users with higher clearance levels. This bypass of security controls allows unauthorized entities to perform actions and retrieve information that should strictly be restricted by the principle of least privilege.
From an operational perspective, this vulnerability poses severe risks related to data confidentiality and integrity. Since ERPNext systems typically manage sensitive enterprise operations including human resources, financial records, customer relationships, and inventory management, the ability for any authenticated user to read personal and proprietary data can lead to significant regulatory compliance violations such as GDPR or HIPAA breaches. The impact extends beyond simple data leakage; it undermines trust in the system's security posture and exposes organizations to potential social engineering attacks using harvested internal information. Furthermore, if certain endpoints allow modification rather than just reading, the risk escalates to include unauthorized changes to critical business logic, potentially disrupting operations or causing financial loss.
This vulnerability aligns with CWE-269 Improper Privilege Management and CWE-862 Missing Authorization in the Common Weakness Enumeration standard. In terms of attack vectors, it corresponds to MITRE ATT&CK technique T1078 Valid Accounts, where adversaries leverage legitimate credentials to move laterally or escalate privileges within a network environment by exploiting misconfigured access controls rather than breaking through authentication barriers directly. The exploitation typically requires no special skills beyond the ability to craft HTTP requests with modified parameters, making it accessible to a wide range of threat actors who have obtained basic user credentials through phishing or credential stuffing attacks.
To mitigate this risk, organizations must immediately apply the vendor-recommended patches by upgrading Frappe ERPNext to version 15.115.0 or later for the v15 branch, and version 16.26.0 or later for the v16 branch. These updates contain the necessary code corrections that enforce rigorous authorization checks on all affected endpoints. In addition to patching, administrators should conduct a thorough review of user roles and permissions within their ERPNext instance to ensure that role definitions are strictly aligned with job requirements. Implementing additional monitoring solutions such as Web Application Firewalls can help detect anomalous access patterns indicative of exploitation attempts while the upgrade process is underway. Regular security audits focusing on API endpoint authorization logic are also recommended to prevent similar misconfigurations in future development cycles.