CVE-2026-29081: Frappe Framework SQLi Vulnerability

CVE-2026-29081 Overview

CVE-2026-29081 is a SQL Injection vulnerability affecting the Frappe full-stack web application framework. Prior to versions 14.100.1 and 15.100.0, an endpoint was vulnerable to SQL injection through specially crafted requests, which would allow a malicious actor to extract sensitive information from the underlying database. This vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Critical Impact

Attackers can exploit this SQL injection flaw to extract sensitive information from Frappe applications, potentially compromising confidential data, user credentials, and business-critical information stored in the database.

Affected Products

• Frappe Framework versions prior to 14.100.1
• Frappe Framework versions prior to 15.100.0

Discovery Timeline

• 2026-03-05 - CVE-2026-29081 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-29081

Vulnerability Analysis

This SQL Injection vulnerability exists in the Frappe web application framework, a popular full-stack framework used for building enterprise applications including ERPNext. The vulnerability allows authenticated attackers to inject malicious SQL commands through specially crafted HTTP requests to a vulnerable endpoint.

The attack can be executed remotely over the network and requires low privileges to exploit. While the vulnerability does not allow modification of data or cause service disruption, it enables complete extraction of confidential information from the database, resulting in high confidentiality impact.

Root Cause

The root cause of CVE-2026-29081 stems from improper neutralization of user-supplied input in SQL queries. The affected endpoint fails to properly sanitize or parameterize user input before incorporating it into database queries, allowing attackers to manipulate the SQL statement structure. This is a classic CWE-89 vulnerability where input validation and prepared statements were not adequately implemented.

Attack Vector

The attack vector for this vulnerability is network-based, requiring an authenticated user with low-level privileges. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting the vulnerable endpoint. The injected SQL commands are then executed by the database engine, allowing the attacker to:

1. Enumerate database tables and columns
2. Extract sensitive data including user credentials and application data
3. Potentially access data across multiple database schemas

The vulnerability mechanism involves sending specially crafted parameters to the vulnerable endpoint. For detailed technical analysis, refer to the GitHub Security Advisory.

Detection Methods for CVE-2026-29081

Indicators of Compromise

• Unusual SQL error messages in application logs indicating syntax errors or unexpected query behavior
• Abnormal database query patterns, particularly queries containing UNION SELECT, OR 1=1, or other common SQL injection signatures
• Unexpected data access patterns or bulk data extraction from sensitive tables
• Authentication bypass attempts or access to records outside normal user permissions

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in HTTP requests
• Enable database query logging and monitor for suspicious query structures or unauthorized data access
• Deploy application-level intrusion detection to identify anomalous request patterns targeting the vulnerable endpoint
• Configure SIEM rules to correlate web server logs with database activity for SQL injection indicators

Monitoring Recommendations

• Review Frappe application access logs for requests containing SQL metacharacters such as single quotes, semicolons, and UNION keywords
• Monitor database audit logs for queries that deviate from normal application behavior
• Set up alerts for failed authentication attempts followed by successful data extraction
• Track API endpoint access patterns for unusual volume or timing of requests

How to Mitigate CVE-2026-29081

Immediate Actions Required

• Upgrade Frappe Framework to version 14.100.1 or 15.100.0 immediately
• Review application logs for any signs of prior exploitation attempts
• Audit database access logs for unauthorized data extraction
• Temporarily restrict access to the vulnerable endpoint if immediate patching is not possible

Patch Information

Frappe has released security patches addressing this SQL Injection vulnerability. Organizations running Frappe Framework should upgrade to the following versions:

• Version 14.x: Upgrade to 14.100.1 or later
• Version 15.x: Upgrade to 15.100.0 or later

For detailed patch information and upgrade instructions, refer to the GitHub Security Advisory.

Workarounds

• Implement input validation at the web server or reverse proxy level to filter SQL injection attempts
• Deploy a Web Application Firewall (WAF) with SQL injection detection rules in front of Frappe applications
• Restrict network access to the Frappe application to trusted IP ranges where possible
• Enable database query logging and implement real-time monitoring for suspicious activity

# Example: Restrict access using nginx until patch can be applied
# Add to nginx configuration for the Frappe site
location ~ /api/method/ {
    # Implement rate limiting
    limit_req zone=frappe_api burst=10 nodelay;
    
    # Block common SQL injection patterns
    if ($args ~* "union.*select|'.*or.*'|;.*--") {
        return 403;
    }
    
    proxy_pass http://frappe_backend;
}