CVE-2026-109616 in ERPNext
Summary
by MITRE • 10/13/2026
Frappe ERPNext before 15.121.3 and 16.x before 16.35.0 contains a missing authorization vulnerability in which certain endpoints fail to enforce proper authorization checks. Authenticated users can send requests to these endpoints to modify 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 failure in access control mechanisms within the Frappe ERPNext framework, specifically affecting versions prior to 15.121.3 and version 16.x prior to 16.35.0. This vulnerability is classified as an Insecure Direct Object Reference or Broken Access Control issue, where the application logic fails to verify whether the authenticated user has sufficient privileges to perform a specific action on a requested resource. Unlike authentication vulnerabilities that allow unauthorized users to enter the system, this flaw targets legitimate accounts, exploiting the gap between identity verification and authorization enforcement. The core technical deficiency lies in the server-side handling of HTTP requests for certain API endpoints or web forms, where the framework does not adequately validate the user's role against the required permissions for the specific operation being attempted.
From a technical perspective, the vulnerability stems from insufficient checks on the request context before executing data modification commands. When an authenticated user interacts with these vulnerable endpoints, the application processes the input and updates database records without confirming that the current session possesses the necessary administrative or elevated rights. This allows attackers who have obtained valid credentials through phishing, credential stuffing, or other means to escalate their privileges effectively by manipulating request parameters. The attacker can send crafted requests to modify sensitive data such as financial transactions, user configurations, inventory levels, or customer information, bypassing the intended role-based access control policies designed to restrict such actions to authorized personnel only.
The operational impact of this vulnerability is severe due to the nature of ERPNext as a comprehensive enterprise resource planning tool that handles critical business operations. Unauthorized modification of data can lead to significant financial loss through fraudulent transactions or altered payment records, compromise of sensitive customer personal information leading to regulatory violations under standards like GDPR or CCPA, and disruption of supply chain logistics by altering inventory counts or supplier details. Furthermore, the integrity of audit trails may be compromised if attackers modify logs or configuration settings that track system activity, making forensic analysis difficult after an incident occurs. The ability for any authenticated user to perform actions beyond their role creates a risk of insider threats being amplified and allows external actors who compromise low-privilege accounts to achieve high-impact outcomes without needing complex privilege escalation exploits against the operating system itself.
This vulnerability aligns with CWE-269, which describes Improper Privilege Management, and is closely related to CWE-862 regarding Missing Authorization checks in security-critical contexts. In terms of offensive cybersecurity frameworks, this behavior corresponds to MITRE ATT&CK technique T1078, specifically the Valid Accounts sub-technique where attackers leverage existing credentials to move laterally or escalate privileges within a network environment by abusing trusted access rights rather than exploiting software bugs directly. The exploitation path is straightforward for any attacker with valid login capabilities, requiring only basic knowledge of HTTP request structures and an understanding of which endpoints are susceptible to parameter manipulation.
To mitigate this risk, organizations running affected versions must immediately upgrade Frappe ERPNext to version 15.121.3 or later, or version 16.x to 16.35.0 or higher, where the authorization checks have been patched and enforced correctly at the framework level. For environments that cannot be updated instantly due to compatibility constraints with custom apps, temporary mitigations should include implementing strict network-level access controls such as Web Application Firewalls configured to monitor for anomalous request patterns indicative of privilege escalation attempts. Additionally, administrators should review existing user roles and permissions to ensure the principle of least privilege is strictly applied, minimizing the potential blast radius if a low-privilege account is compromised. Regular security audits focusing on API endpoint authorization logic are recommended to detect similar misconfigurations in custom modules or third-party integrations that may not receive automatic framework updates.