CVE-2026-4317: Umami Software SQLi Vulnerability

CVE-2026-4317 Overview

A SQL injection (SQLi) vulnerability has been identified in the Umami Software web application that allows authenticated attackers to execute arbitrary SQL commands in the database. The vulnerability exists due to improper sanitization of the timezone request parameter, which enables malicious actors to inject SQL payload directly into database queries.

Critical Impact
Authenticated attackers can compromise database integrity by executing arbitrary SQL commands, potentially leading to unauthorized data access, data manipulation, and execution of dangerous database functions.

Affected Products

Umami Software Web Application (affected versions not specified)

Discovery Timeline

2026-03-31 - CVE-2026-4317 published to NVD
2026-04-01 - Last updated in NVD database

Technical Details for CVE-2026-4317

Vulnerability Analysis

This vulnerability falls under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), commonly known as SQL Injection. The core issue lies in how the Umami Software web application handles user-supplied input in the timezone parameter without proper validation or sanitization.

When processing requests, the application directly interpolates user-controlled values from the timezone parameter into SQL queries. This occurs through the use of unsafe query methods such as prisma.rawQuery, prisma.$queryRawUnsafe, or raw queries with ClickHouse. By including malicious characters and SQL payload in the parameter value, an authenticated attacker can manipulate the structure and behavior of the resulting database query.

The successful exploitation of this vulnerability allows attackers to read, modify, or delete database contents, potentially extract sensitive information, and execute dangerous database functions that could further compromise the system.

Root Cause

The root cause of this vulnerability is the failure to properly sanitize or parameterize user input before incorporating it into SQL queries. The application uses unsafe query construction methods that concatenate or interpolate user-supplied data directly into SQL statements. Functions like prisma.$queryRawUnsafe and raw ClickHouse queries bypass the ORM's built-in protection mechanisms, leaving the application vulnerable to injection attacks when processing the timezone parameter.

Attack Vector

The attack is network-based and requires the attacker to have valid authentication credentials to the Umami Software application. Once authenticated, the attacker can craft malicious HTTP requests containing SQL injection payloads in the timezone parameter. The application processes these requests without adequate input validation, allowing the injected SQL commands to execute against the backend database.

An attacker would typically manipulate the timezone parameter by appending SQL syntax characters (such as single quotes, semicolons, or comment markers) followed by malicious SQL statements. Since the application directly incorporates these values into queries, the database engine interprets and executes the injected commands alongside the legitimate query.

For detailed technical information about this vulnerability, refer to the INCIBE Security Notice.

Detection Methods for CVE-2026-4317

Indicators of Compromise

Unusual or malformed values in the timezone request parameter containing SQL syntax characters (single quotes, double quotes, semicolons, comment markers)
Database error messages in application logs indicating SQL syntax errors or unexpected query behavior
Unexpected database queries or operations that deviate from normal application patterns
Evidence of data exfiltration or unauthorized database modifications

Detection Strategies

Implement web application firewall (WAF) rules to detect and block SQL injection patterns in the timezone parameter
Monitor application logs for requests containing SQL syntax characters in the timezone field
Deploy database activity monitoring to identify anomalous query patterns or unauthorized SQL commands
Review audit logs for unusual authenticated user activity targeting analytics or timezone-related endpoints

Monitoring Recommendations

Enable detailed logging for all HTTP requests, particularly those containing the timezone parameter
Configure database query logging to capture and analyze executed SQL statements
Set up alerts for SQL error conditions that may indicate injection attempts
Monitor for unusual data access patterns or bulk data retrieval from authenticated sessions

How to Mitigate CVE-2026-4317

Immediate Actions Required

Review and audit all code paths that process the timezone parameter for proper input sanitization
Replace unsafe query methods (prisma.$queryRawUnsafe, raw queries) with parameterized queries using prisma.$queryRaw with template literals
Implement strict input validation for the timezone parameter, allowing only valid timezone identifiers
Consider temporarily restricting access to affected endpoints until a patch is applied

Patch Information

Consult the INCIBE Security Notice for the latest patch information and vendor guidance. Monitor Umami Software's official channels for security updates addressing this vulnerability.

Workarounds

Implement a web application firewall (WAF) with rules specifically targeting SQL injection patterns in request parameters
Add server-side validation to reject timezone parameter values that contain SQL metacharacters or do not match valid timezone formats
Consider using an allowlist approach that only permits known-good timezone identifiers
Enable prepared statements or parameterized queries at the database driver level as a defense-in-depth measure

bash

# Example WAF rule concept for blocking SQL injection in timezone parameter
# Implement appropriate rules in your WAF solution to block requests containing:
# - Single quotes (') in timezone values
# - SQL keywords like UNION, SELECT, INSERT, DELETE, DROP
# - Comment markers (-- or /*) in parameter values
# Consult your WAF documentation for specific rule syntax