CVE-2026-24913: Matcha Invoice SQL Injection Vulnerability

CVE-2026-24913 Overview

CVE-2026-24913 is a SQL injection vulnerability [CWE-89] affecting MATCHA INVOICE version 2.6.6 and earlier, developed by ICZ. Authenticated users can manipulate SQL queries to read or modify data stored in the application database. The flaw requires valid login credentials but no user interaction, making it exploitable by any account with access to the product.

The vulnerability was disclosed through Japan Vulnerability Notes (JVN) under advisory JVN33581068 and confirmed by ICZ in an official news update.

Critical Impact

Authenticated attackers can extract or alter sensitive invoice data, customer records, and financial information stored in the MATCHA INVOICE database.

Affected Products

• ICZ MATCHA INVOICE version 2.6.6
• ICZ MATCHA INVOICE versions prior to 2.6.6
• Deployments exposing the product to authenticated low-privilege users

Discovery Timeline

• 2026-04-08 - CVE-2026-24913 published to NVD
• 2026-04-17 - Last updated in NVD database

Technical Details for CVE-2026-24913

Vulnerability Analysis

The vulnerability stems from improper neutralization of special elements used in SQL commands within MATCHA INVOICE. User-supplied input reaches database query construction without adequate sanitization or parameterization. An authenticated attacker can inject crafted SQL syntax through application parameters to alter query logic.

Successful exploitation grants the attacker read and write access to database records that exceed their intended application permissions. The classification under [CWE-89] confirms the root cause as SQL Injection. Attack complexity is low and the network attack vector means exploitation can occur remotely once the attacker authenticates.

Because the product handles invoice data, exposed records can include customer information, payment data, and internal accounting details. Integrity impact is equal to confidentiality impact — attackers can both read and modify stored data.

Root Cause

The root cause is direct concatenation or interpolation of untrusted input into SQL statements rather than the use of parameterized queries or prepared statements. Input validation routines do not strip or escape SQL metacharacters before query execution. Refer to the JVN Security Advisory for additional technical detail.

Attack Vector

An attacker authenticates to MATCHA INVOICE using legitimate or compromised credentials. The attacker then submits crafted input through a vulnerable parameter that influences a backend SQL query. The malicious payload modifies query logic to return additional rows, bypass record filters, or execute UPDATE and DELETE operations outside the intended scope.

No verified proof-of-concept code is publicly available. The vulnerability mechanism is consistent with standard SQL injection patterns documented in the vendor advisory at ICZ News Update.

Detection Methods for CVE-2026-24913

Indicators of Compromise

• Application or database logs showing unexpected SQL syntax such as UNION SELECT, OR 1=1, or comment sequences (--, /*) in request parameters
• Database queries originating from MATCHA INVOICE sessions accessing tables outside normal application workflow
• Anomalous volumes of SELECT, UPDATE, or DELETE operations tied to a single authenticated user session
• Authentication events followed immediately by high-frequency parameter manipulation in HTTP request logs

Detection Strategies

• Inspect web server and application logs for SQL metacharacters in POST and GET parameters submitted to MATCHA INVOICE endpoints
• Enable database-level query auditing to capture and review queries executed by the application service account
• Deploy a Web Application Firewall (WAF) with SQL injection signatures in front of the MATCHA INVOICE application
• Correlate authenticated session activity with database access patterns to flag unusual data retrieval volumes

Monitoring Recommendations

• Alert on database errors returned to the application that contain SQL syntax fragments, which often accompany injection probing
• Monitor for changes to invoice, customer, or financial tables outside scheduled business operations
• Track failed login attempts followed by successful authentication and immediate complex query activity

How to Mitigate CVE-2026-24913

Immediate Actions Required

• Upgrade MATCHA INVOICE to a version later than 2.6.6 as soon as the vendor patch is applied to your deployment
• Audit all user accounts in MATCHA INVOICE and disable or rotate credentials for accounts that are inactive or unnecessary
• Review database and application logs for evidence of prior exploitation against the affected versions
• Restrict network access to the MATCHA INVOICE application to trusted networks until patching is complete

Patch Information

ICZ has published guidance and version information through the ICZ News Update. Administrators should apply the fixed release identified in the vendor advisory. Verify the installed version after upgrade and confirm that the patched build is in production.

Workarounds

• Place MATCHA INVOICE behind a WAF configured with SQL injection rule sets if immediate patching is not feasible
• Limit the database account used by the application to least-privilege permissions, removing UPDATE and DELETE rights where the workflow allows
• Enforce strong authentication and multi-factor authentication on all MATCHA INVOICE user accounts to reduce attacker access to the authenticated attack surface

# Example: restrict database privileges for the application account
REVOKE DELETE, DROP, ALTER ON matcha_invoice.* FROM 'matcha_app'@'%';
GRANT SELECT, INSERT, UPDATE ON matcha_invoice.* TO 'matcha_app'@'%';
FLUSH PRIVILEGES;