CVE-2026-109663 in ERPNext
Summary
by MITRE • 10/13/2026
Frappe ERPNext before 15.113.0 and 16.x before 16.22.0 contains an SQL injection vulnerability caused by missing input validation in some endpoints. Authenticated remote attackers can send specially crafted requests to these endpoints to manipulate database queries and extract sensitive information from the database.
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Analysis
by VulDB Data Team • 10/13/2026
The identified security flaw resides within Frappe ERPNext, a widely adopted open-source enterprise resource planning framework used for managing business processes such as accounting, inventory, human resources, and customer relationship management. Specifically, versions prior to 15.113.0 in the v15 branch and before 16.22.0 in the v16 branch are susceptible to a critical SQL injection vulnerability. This issue stems from insufficient input validation on specific API endpoints within the application's backend architecture. In modern web applications, particularly those built with frameworks like Frappe that expose RESTful APIs for integration with third-party systems or mobile clients, proper sanitization of user-supplied data is paramount to prevent malicious code execution against the underlying database management system.
The technical nature of this vulnerability allows authenticated remote attackers to exploit the lack of validation by injecting arbitrary SQL commands into request parameters. Because the application fails to properly escape or parameterize these inputs before incorporating them into dynamic database queries, an attacker can manipulate the logic of the query itself rather than just its data payload. This capability enables the extraction of sensitive information stored in the ERPNext database, which may include financial records, employee personal identifiable information, supplier contracts, and other proprietary business data. The requirement for authentication does not mitigate this risk significantly, as compromised credentials or insider threats can leverage this flaw to escalate their access privileges or exfiltrate large volumes of critical data without triggering typical intrusion detection systems that focus on unauthenticated attacks.
From an operational perspective, the impact of this vulnerability is severe due to the central role ERPNext plays in many organizations' daily operations. Successful exploitation could lead to a complete compromise of data integrity and confidentiality. Attackers might not only read sensitive information but potentially modify or delete critical records if the database user permissions allow write access through the application context. This aligns with the Common Weakness Enumeration category CWE-89, which classifies improper neutralization of special elements used in an SQL command, commonly known as SQL injection. Furthermore, this attack vector maps to MITRE ATT&CK technique T1059, specifically sub-technique 004 for Command and Scripting Interpreter: SQL commands, highlighting the method by which attackers interact with backend systems to achieve their objectives.
To mitigate this vulnerability, organizations running affected versions of Frappe ERPNext must immediately apply the official security patches provided in version 15.113.0 or later for the v15 branch and version 16.22.0 or later for the v16 branch. It is crucial to verify that all instances within an organization, including staging and development environments if they mirror production data configurations, are updated consistently. Additionally, administrators should review access logs for any signs of suspicious query patterns indicative of SQL injection attempts prior to patching. Implementing a Web Application Firewall with rules tuned to detect common SQL injection signatures can provide an additional layer of defense during the transition period. Long-term remediation strategies should include enforcing strict input validation protocols across all API endpoints and adopting parameterized queries as a standard development practice within the Frappe framework ecosystem to prevent similar vulnerabilities from arising in future releases.