CVE-2026-34717: OpenProject SQL Injection Vulnerability

CVE-2026-34717 Overview

CVE-2026-34717 is a SQL Injection vulnerability affecting OpenProject, an open-source, web-based project management software. Prior to version 17.2.3, the =n operator in modules/reporting/lib/report/operator.rb:177 embeds user input directly into SQL WHERE clauses without parameterization. This allows authenticated attackers to manipulate SQL queries and potentially compromise database integrity and confidentiality.

Critical Impact

This SQL Injection vulnerability enables authenticated attackers to execute arbitrary SQL commands against the underlying database, potentially leading to unauthorized data access, data modification, or complete database compromise with cross-scope impact.

Affected Products

• OpenProject versions prior to 17.2.3
• OpenProject reporting module (modules/reporting/lib/report/operator.rb)
• All deployments using vulnerable OpenProject versions with the reporting feature enabled

Discovery Timeline

• 2026-04-02 - CVE CVE-2026-34717 published to NVD
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2026-34717

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), a well-known and dangerous class of web application security flaws. The issue stems from improper handling of user-controlled input within the reporting module's operator functionality.

The vulnerable code path exists in the =n operator implementation located at modules/reporting/lib/report/operator.rb on line 177. When processing user input, the application directly concatenates or interpolates this data into SQL WHERE clauses rather than using parameterized queries or prepared statements. This architectural flaw allows attackers with authenticated access to inject malicious SQL syntax that gets executed by the database engine.

The network-accessible nature of this vulnerability combined with low attack complexity makes it particularly dangerous. While authentication is required, the potential for cross-scope impact means successful exploitation could affect resources beyond the vulnerable component's security scope.

Root Cause

The root cause of CVE-2026-34717 is the direct embedding of unsanitized user input into dynamically constructed SQL queries. The =n operator in the reporting module fails to use parameterized queries or proper input sanitization, allowing attackers to break out of the intended query context and inject arbitrary SQL commands.

This represents a fundamental secure coding violation where untrusted input flows directly into a security-sensitive operation (database query construction) without adequate validation or escaping.

Attack Vector

The attack vector for CVE-2026-34717 is network-based, requiring authenticated access to the OpenProject application. An attacker with valid credentials can exploit this vulnerability by manipulating input parameters processed by the =n operator in the reporting module.

The exploitation flow involves:

1. Authenticating to the OpenProject application with valid credentials
2. Accessing the reporting functionality that utilizes the vulnerable operator
3. Crafting malicious input containing SQL syntax designed to manipulate the query structure
4. Submitting the request to trigger SQL injection via the unparameterized WHERE clause
5. Extracting sensitive data, modifying records, or escalating privileges within the database

The vulnerability does not require user interaction beyond the attacker's own actions, and can potentially affect resources outside the vulnerable component's security scope.

Detection Methods for CVE-2026-34717

Indicators of Compromise

• Unusual database query patterns or errors in application logs, particularly from the reporting module
• Unexpected data access patterns or bulk data extraction from the OpenProject database
• Application log entries showing SQL syntax errors or malformed query warnings
• Unusual account activity or privilege changes within OpenProject

Detection Strategies

• Monitor web application firewall (WAF) logs for SQL injection patterns targeting the reporting module endpoints
• Implement database activity monitoring to detect anomalous query structures or unauthorized data access
• Review OpenProject application logs for errors or anomalies related to the =n operator in reporting functionality
• Deploy intrusion detection signatures for common SQL injection payloads targeting Ruby/Rails applications

Monitoring Recommendations

• Enable detailed logging for the OpenProject reporting module to capture all query parameters
• Configure database audit logging to track all queries executed by the application service account
• Set up alerts for SQL syntax errors or database exception patterns that may indicate injection attempts
• Monitor for unusual data exfiltration patterns or large result sets from reporting queries

How to Mitigate CVE-2026-34717

Immediate Actions Required

• Upgrade OpenProject to version 17.2.3 or later immediately
• Review access logs and database audit trails for signs of exploitation
• Temporarily restrict access to the reporting module if immediate patching is not possible
• Conduct a security review of any data potentially accessed through the vulnerable endpoint

Patch Information

OpenProject has released version 17.2.3 which addresses this SQL Injection vulnerability. The patch implements proper parameterization for the =n operator, preventing user input from being directly embedded in SQL queries.

For detailed patch information, refer to the GitHub Release v17.2.3 and the GitHub Security Advisory GHSA-5rrm-6qmq-2364.

Workarounds

• Restrict access to the reporting module to only trusted administrative users until the patch can be applied
• Implement web application firewall (WAF) rules to filter SQL injection patterns targeting reporting endpoints
• Consider network segmentation to limit database access from the application tier
• Disable or remove the reporting module temporarily if it is not business-critical

# Configuration example - Restrict access to reporting module via web server
# For Nginx, add to your OpenProject server block:
location /cost_reports {
    # Restrict to trusted IP addresses only
    allow 10.0.0.0/8;
    deny all;
}

# For Apache, add to your VirtualHost configuration:
# <Location /cost_reports>
#     Require ip 10.0.0.0/8
# </Location>