CVE-2026-90700: Sales and Inventory System 1.0 SQLI Flaw

CVE-2026-90700 Overview

CVE-2026-90700 is a SQL injection vulnerability in itsourcecode Sales and Inventory System 1.0. The flaw affects an unknown function in the file /pages/pro_edit1.php and stems from unsafe handling of the prodcode parameter. Remote attackers with low-level privileges can manipulate this argument to inject arbitrary SQL statements. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The exploit has been publicly disclosed, increasing the likelihood of opportunistic abuse against exposed instances.

Critical Impact
Authenticated remote attackers can inject SQL statements through the prodcode parameter, potentially exposing or modifying product and inventory records stored in the backend database.

Affected Products

itsourcecode Sales and Inventory System 1.0
Vulnerable file: /pages/pro_edit1.php
Vulnerable parameter: prodcode

Discovery Timeline

2026-09-14 - CVE-2026-90700 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-90700

Vulnerability Analysis

The vulnerability resides in /pages/pro_edit1.php, a product-edit endpoint within the Sales and Inventory System. User-controlled input supplied through the prodcode argument is concatenated directly into a SQL query without parameterization or sanitization. This allows an attacker to break out of the intended SQL context and inject arbitrary clauses.

Exploitation requires network access to the application and low-privilege authentication. Successful injection can disclose or modify records in the underlying database, including product, pricing, and inventory data. The public availability of proof-of-concept material lowers the barrier for exploitation. Additional technical detail is documented in the GitHub CVE Project Documentation and the VulDB CVE-2026-90700 entry.

Root Cause

The root cause is improper neutralization of special characters in the prodcode HTTP parameter before it is used in a SQL statement. The application does not use prepared statements or parameterized queries, and it does not apply input validation appropriate to the expected data type of a product code.

Attack Vector

The attack vector is network-based. An authenticated user submits a crafted value for prodcode to /pages/pro_edit1.php, embedding SQL syntax such as boolean-based, union-based, or time-based payloads. Because the application executes the resulting query with the privileges of the database service account, the attacker inherits those privileges within the database context.

No verified exploit code is available for republication. Refer to the VulDB Vulnerability #403233 record for further indicators.

Detection Methods for CVE-2026-90700

Indicators of Compromise

HTTP requests to /pages/pro_edit1.php containing SQL metacharacters such as single quotes, UNION, SELECT, SLEEP, or comment sequences (--, #) in the prodcode parameter.
Web server or PHP error logs showing SQL syntax errors originating from pro_edit1.php.
Unexpected database read or write operations against product and inventory tables outside normal business hours.

Detection Strategies

Deploy web application firewall (WAF) rules that identify SQL injection patterns targeting the prodcode parameter on the affected path.
Enable database query auditing to flag anomalous UNION, INFORMATION_SCHEMA, or timing-function queries originating from the application user.
Correlate authentication events with subsequent access to /pages/pro_edit1.php to identify low-privilege accounts issuing malformed input.

Monitoring Recommendations

Monitor outbound network traffic from the database host for unusual data transfers that may indicate exfiltration.
Track spikes in HTTP 500 responses from pro_edit1.php, which often accompany injection probing.
Ingest web server, application, and database logs into a centralized platform for cross-source correlation and retention.

How to Mitigate CVE-2026-90700

Immediate Actions Required

Restrict access to /pages/pro_edit1.php to trusted internal networks or VPN users until a fix is in place.
Rotate credentials for the database account used by the application and enforce least-privilege permissions.
Deploy WAF signatures that block SQL metacharacters in the prodcode parameter.

Patch Information

No vendor patch has been published in the referenced advisories at the time of NVD publication. Consult the IT Source Code Resource for vendor updates, and monitor the VulDB CVE-2026-90700 record for advisory revisions. Organizations that maintain custom builds should refactor the vulnerable query in /pages/pro_edit1.php to use parameterized statements via PDO or MySQLi prepared statements.

Workarounds

Apply server-side input validation that restricts prodcode to an expected character set and length before database interaction.
Configure the database account used by the application to deny schema-modifying operations and access to system tables such as INFORMATION_SCHEMA.
Where feasible, take the application offline or gate it behind additional authentication until a code-level fix is applied.

bash

# Example ModSecurity rule to block SQLi patterns targeting the prodcode parameter
SecRule ARGS:prodcode "@rx (?i)(union(\s|/\*.*\*/)+select|sleep\s*\(|--|#|';)" \
    "id:1029070,\
     phase:2,\
     deny,\
     status:403,\
     msg:'Potential SQL Injection in prodcode (CVE-2026-90700)'"