CVE-2026-109622 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. Authenticated users can send requests to the affected endpoints to modify data beyond their permitted role, compromising data integrity.
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Analysis
by VulDB Data Team • 10/13/2026
The identified security flaw represents a critical failure in access control mechanisms within Frappe ERPNext versions prior to 15.121.0 and 16.x prior to version 16.34.0. This vulnerability is classified as an Insecure Direct Object Reference or Broken Access Control issue, specifically falling under the CWE-862 category of Missing Authorization. The core technical defect lies in the application logic governing specific API endpoints and web interfaces, where the system fails to validate whether the authenticated user possesses the necessary permissions for the requested action. While the authentication layer successfully verifies that a user is logged into the system, it neglects to perform subsequent authorization checks to ensure that the user's assigned role or permission set allows them to interact with specific data objects or execute administrative functions. This architectural oversight creates a significant gap in security posture, allowing any authenticated account, regardless of its privilege level, to bypass intended restrictions and manipulate sensitive information.
From an operational perspective, this vulnerability poses severe risks to data integrity and confidentiality within enterprise environments relying on ERPNext for business process management. Because the flaw permits users with low-level privileges, such as standard employees or read-only accounts, to execute actions reserved for administrators or managers, attackers can alter financial records, modify customer details, change inventory levels, or adjust system configurations without detection by traditional perimeter defenses. The impact extends beyond simple data corruption; it undermines the trust in the integrity of business operations and can lead to significant financial loss, regulatory non-compliance, and reputational damage. In a multi-tenant SaaS deployment scenario, this could potentially allow one tenant's user to access or modify another tenant's data if the isolation logic relies on similar flawed authorization checks, although the primary impact described focuses on intra-role privilege escalation within a single instance.
The vulnerability aligns with MITRE ATT&CK technique T1078, Valid Accounts, as it exploits legitimate credentials that have been compromised or misused due to insufficient access controls. It also relates to T1496, Resource Hijacking, if the modification of system settings leads to resource exhaustion, and more directly to privilege escalation vectors where a lower-privileged user gains higher-level capabilities. The absence of proper server-side validation means that client-side restrictions are easily bypassed by crafting direct HTTP requests with modified parameters or using automated tools like Burp Suite to replay and alter authenticated sessions. This lack of robust backend enforcement is a common pitfall in web application development, where developers may rely on frontend logic for security decisions rather than enforcing strict policy checks at the API level.
To mitigate this vulnerability, organizations must immediately upgrade their Frappe ERPNext instances to version 15.121.0 or later, which includes patches addressing these authorization gaps. For environments unable to patch immediately due to compatibility constraints, temporary mitigations should include restricting access to affected endpoints via web application firewalls by validating user roles against a whitelist of allowed actions for each specific API path. Additionally, implementing strict logging and monitoring for anomalous data modification patterns can help detect exploitation attempts in real-time. It is also advisable to review and harden the custom role definitions within the ERPNext instance to ensure that permissions are granted on a least-privilege basis, minimizing the blast radius if such an endpoint remains accessible during the transition period. Regular security audits focusing on access control logic should be conducted to prevent similar misconfigurations in future development cycles.