CVE-2026-109631 Overview
CVE-2026-109631 is an SQL injection vulnerability in Frappe ERPNext affecting versions before 15.119.1 and 16.x before 16.32.0. Several endpoints fail to validate user-supplied input, allowing crafted parameters to alter database queries. Authenticated attackers with low privileges can send specially crafted requests to extract sensitive data from the backend database. The flaw is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). ERPNext is a widely deployed open-source ERP suite used for finance, HR, manufacturing, and CRM, which increases the exposure footprint for organizations running vulnerable builds.
Critical Impact
Low-privileged authenticated users can exfiltrate confidential records from the ERPNext database by injecting SQL fragments into vulnerable endpoints.
Affected Products
- Frappe ERPNext versions prior to 15.119.1
- Frappe ERPNext 16.x versions prior to 16.32.0
- Deployments exposing vulnerable endpoints to authenticated users
Discovery Timeline
- 2026-10-12 - CVE-2026-109631 published to NVD
- 2026-10-15 - Last updated in NVD database
Technical Details for CVE-2026-109631
Vulnerability Analysis
The vulnerability resides in ERPNext endpoints that construct database queries using unsanitized input. Attackers who hold a valid low-privilege account can submit crafted parameters that break out of the intended query context. The injected SQL executes with the privileges of the application database user, which typically has broad read access across ERPNext tables. Confidential records including customer data, financial entries, and employee information become reachable through blind or union-based extraction techniques. The impact centers on confidentiality rather than modification, since the issue enables data extraction through altered SELECT logic.
Root Cause
The root cause is missing input validation and the use of string concatenation when constructing SQL queries in affected endpoints. Parameters that should have been bound as values or sanitized against an allowlist are passed directly into query construction. This pattern maps to CWE-89, where untrusted input flows into a SQL statement without neutralization of control characters.
Attack Vector
Exploitation requires network access to the ERPNext application and valid authentication at a low privilege tier. The attacker submits HTTP requests to vulnerable endpoints with payloads crafted to manipulate the generated SQL. No user interaction is required beyond the attacker's own session. Technical specifics for the affected endpoints are documented in the GitHub Security Advisory and the VulnCheck SQL Injection Advisory.
// No verified exploit code is published. Refer to the vendor advisory
// for endpoint-level technical details and reproduction guidance.
Detection Methods for CVE-2026-109631
Indicators of Compromise
- Authenticated HTTP requests containing SQL control characters such as single quotes, UNION, SELECT, SLEEP(, or comment sequences -- and /* in parameters.
- Database error messages or stack traces returned to low-privileged accounts.
- Unusual spikes in query duration or row counts originating from standard ERPNext endpoints.
Detection Strategies
- Enable Frappe application and database query logging and alert on queries containing injection primitives from non-administrative sessions.
- Deploy a Web Application Firewall ruleset tuned for SQL injection patterns against the ERPNext hostname.
- Correlate authentication logs with abnormal query volumes to identify low-privileged accounts probing endpoints.
Monitoring Recommendations
- Monitor outbound data volume from the ERPNext database tier for exfiltration patterns.
- Track creation of new API keys and session tokens on low-privilege accounts following suspicious requests.
- Review access logs for repeated requests to the same endpoint with mutating parameter values characteristic of blind SQLi enumeration.
How to Mitigate CVE-2026-109631
Immediate Actions Required
- Upgrade Frappe ERPNext to version 15.119.1 or later on the 15.x branch.
- Upgrade Frappe ERPNext to version 16.32.0 or later on the 16.x branch.
- Rotate credentials and API keys for low-privileged accounts that may have been abused prior to patching.
- Audit database logs for suspicious queries dating back to the deployment of vulnerable versions.
Patch Information
Fixes are available in Frappe ERPNext 15.119.1 and 16.32.0. Patch details and affected endpoints are described in the GitHub Security Advisory GHSA-jp5q-723q-g826. Administrators should follow the standard Frappe bench update workflow or container image rebuild procedure for their deployment model.
Workarounds
- Restrict access to the ERPNext application to trusted networks or VPN users until patching completes.
- Temporarily disable or firewall off low-privileged API accounts that are not operationally required.
- Place a WAF in blocking mode in front of ERPNext with SQL injection signatures enabled.
# Example: upgrade an ERPNext bench deployment to the patched release
bench switch-to-branch version-15 erpnext --upgrade
bench update --reset
bench --site all migrate
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
