CVE-2026-6060: OTRS SQL Box DoS Vulnerability

CVE-2026-6060 Overview

A vulnerability exists in the SQL Box feature within the admin interface of OTRS (Open-source Ticket Request System) that leads to uncontrolled resource consumption. When exploited, this vulnerability can cause a Denial of Service (DoS) condition against the webserver, potentially causing the affected process to be killed by the system.

Critical Impact

Authenticated administrators can trigger uncontrolled resource consumption through the SQL Box interface, leading to webserver unavailability and service disruption.

Affected Products

• OTRS 7.0.X
• OTRS 8.0.X
• OTRS 2023.X
• OTRS 2024.X
• OTRS 2025.X
• OTRS 2026.X before 2026.3.X

Discovery Timeline

• 2026-04-20 - CVE-2026-6060 published to NVD
• 2026-04-21 - Last updated in NVD database

Technical Details for CVE-2026-6060

Vulnerability Analysis

This vulnerability is classified under CWE-400 (Uncontrolled Resource Consumption), commonly known as a resource exhaustion vulnerability. The flaw resides in the SQL Box functionality within the OTRS administrative interface, which is designed to allow administrators to execute SQL queries directly against the database.

The vulnerability allows an authenticated administrator to craft malicious SQL queries that consume excessive system resources. When such queries are executed through the SQL Box interface, they can exhaust available memory, CPU cycles, or other system resources to the point where the webserver process is terminated by the operating system.

While the attack requires high privileges (administrative access) and some user interaction, the impact is significant as it can render the entire OTRS ticketing system unavailable, disrupting customer service and internal support operations.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and resource management within the SQL Box functionality. The OTRS admin interface fails to implement proper controls to limit the scope and resource consumption of SQL queries executed through this feature.

Specifically, the application does not enforce:

• Query execution time limits
• Memory consumption thresholds
• Result set size restrictions
• CPU usage boundaries

This lack of resource governance allows crafted queries to consume unbounded system resources until the operating system's resource protection mechanisms terminate the webserver process.

Attack Vector

The attack vector for CVE-2026-6060 requires network access to the OTRS admin interface with high-privilege (administrator) credentials. An attacker with administrative access can navigate to the SQL Box feature and submit specially crafted SQL queries designed to maximize resource consumption.

The exploitation mechanism involves constructing SQL statements that trigger computationally expensive operations, such as:

• Cartesian joins across large tables
• Recursive queries without proper termination
• Complex aggregations on unindexed columns
• Queries that generate massive result sets

Once submitted, these resource-intensive queries consume server resources until the system's protection mechanisms intervene, killing the webserver process and causing service disruption for all users.

Detection Methods for CVE-2026-6060

Indicators of Compromise

• Unusual spikes in database query execution times from the OTRS admin interface
• Webserver process crashes or restarts coinciding with SQL Box usage
• System logs showing OOM (Out of Memory) killer terminating OTRS-related processes
• Abnormal CPU or memory utilization patterns on the OTRS server
• Multiple rapid connections to the SQL Box admin functionality

Detection Strategies

• Monitor OTRS application logs for SQL Box access patterns and query submissions
• Implement database query logging to capture potentially malicious SQL statements
• Configure system-level resource monitoring to alert on unusual consumption patterns
• Review admin user activity logs for suspicious SQL Box usage patterns
• Deploy web application firewall rules to detect anomalous admin interface behavior

Monitoring Recommendations

• Enable detailed audit logging for all SQL Box interactions
• Set up alerts for webserver process terminations or restarts
• Monitor database server performance metrics for query-related anomalies
• Track admin user session activity for unusual patterns
• Implement real-time monitoring of system resource utilization on OTRS servers

How to Mitigate CVE-2026-6060

Immediate Actions Required

• Upgrade OTRS to version 2026.3.X or later as soon as possible
• Restrict SQL Box access to only essential personnel pending the upgrade
• Review and audit administrative user accounts for unnecessary privileges
• Implement additional authentication requirements for SQL Box access
• Consider temporarily disabling the SQL Box feature if not operationally critical

Patch Information

OTRS has released a security patch addressing this vulnerability. Organizations should upgrade to OTRS version 2026.3.X or later to remediate this issue. For detailed patch information and upgrade instructions, refer to the OTRS Security Advisory 2026-01.

Workarounds

• Disable or restrict access to the SQL Box functionality in the admin interface
• Implement network-level access controls to limit who can reach the admin interface
• Configure web application firewall rules to monitor and limit admin interface traffic
• Apply system-level resource limits (ulimit, cgroups) to constrain OTRS process resources
• Deploy monitoring to detect and alert on resource exhaustion conditions