CVE-2026-86245: Sales and Inventory System SQLi Flaw

CVE-2026-86245 is a SQL injection vulnerability in itsourcecode Sales and Inventory System 1.0 affecting the sup_transac.php file. Attackers can exploit the companyname parameter remotely to manipulate database queries. This article covers technical details, impact assessment, and mitigation strategies.

CVE-2026-86245 Overview

CVE-2026-86245 is a SQL injection vulnerability in itsourcecode Sales and Inventory System 1.0. The flaw resides in the /pages/sup_transac.php script, where the companyname parameter is passed to a database query without proper sanitization. Attackers with low-privilege access can manipulate this parameter to inject arbitrary SQL statements. The vulnerability is remotely exploitable and a public exploit is available. The weakness is classified under [CWE-74] (Improper Neutralization of Special Elements in Output).

Critical Impact
Remote attackers with authenticated low-privilege access can inject SQL statements through the companyname parameter, potentially exposing or modifying data in the Sales and Inventory System database.

Affected Products

itsourcecode Sales and Inventory System 1.0
Vulnerable script: /pages/sup_transac.php
Vulnerable parameter: companyname

Discovery Timeline

2026-09-07 - CVE-2026-86245 published to NVD
2026-09-08 - Last updated in NVD database

Technical Details for CVE-2026-86245

Vulnerability Analysis

The vulnerability affects the supplier transaction handler in the itsourcecode Sales and Inventory System. The sup_transac.php script accepts a companyname argument from HTTP request input and incorporates it directly into a SQL statement. Because the application does not neutralize special SQL characters, an attacker can break out of the intended query context and append arbitrary clauses. Public disclosure of the exploit lowers the barrier to weaponization. According to the EPSS forecast dated 2026-09-11, the probability of exploitation activity in the next 30 days remains low.

Root Cause

The root cause is the absence of input validation and parameterized queries in /pages/sup_transac.php. User-supplied data flows into a dynamically constructed SQL query without prepared statements or escaping. This pattern maps directly to [CWE-74], where untrusted input is used to build output consumed by a downstream interpreter — in this case, the MySQL/MariaDB backend.

Attack Vector

An authenticated attacker sends an HTTP request to the vulnerable endpoint with a crafted companyname value. The payload closes the original string literal and appends SQL syntax such as UNION SELECT clauses or boolean-based conditions. The attacker can enumerate database schema, extract records, or alter stored data. Refer to the VulDB CVE-2026-86245 entry and the GitHub CVE Issue Discussion for the published proof-of-concept details.

Detection Methods for CVE-2026-86245

Indicators of Compromise

HTTP POST or GET requests to /pages/sup_transac.php containing SQL metacharacters such as ', --, UNION, or SLEEP( inside the companyname parameter.
Web server access logs showing abnormally long or URL-encoded companyname values.
Database error messages or unusually large result sets returned from queries originating in sup_transac.php.

Detection Strategies

Deploy a web application firewall rule that inspects the companyname parameter for SQL syntax and blocks matches.
Enable database query logging and alert on queries against supplier tables that contain concatenated user input patterns.
Correlate authentication events with subsequent access to sup_transac.php to detect credential misuse.

Monitoring Recommendations

Monitor for repeated 500-series HTTP responses from /pages/sup_transac.php, which often indicate injection probing.
Track outbound database connections and query volumes from the application host for anomalies.
Review web server logs for scanner user-agents targeting itsourcecode PHP applications.

How to Mitigate CVE-2026-86245

Immediate Actions Required

Restrict network access to the Sales and Inventory System to trusted internal users until a fix is applied.
Audit application accounts and rotate credentials that may have interacted with sup_transac.php.
Review database contents in supplier and transaction tables for signs of unauthorized modification.

Patch Information

No vendor patch is referenced in the enriched CVE data. Consult the IT Source Code Resources site and the VulDB Vulnerability Details page for updates. Until a vendor release is available, apply the mitigations below.

Workarounds

Modify /pages/sup_transac.php to use parameterized queries with PDO or MySQLi prepared statements instead of string concatenation.
Apply server-side input validation on the companyname field, restricting length and permitted character classes.
Deploy a WAF signature that rejects SQL keywords in the companyname parameter.
Enforce least-privilege on the database account used by the application to reduce the blast radius of successful injection.

bash

# Example ModSecurity rule to block SQL metacharacters in the companyname parameter
SecRule ARGS:companyname "@rx (?i)(union(\s|/\*.*\*/)+select|--|;|\bor\b\s+\d+=\d+|sleep\s*\()" \
    "id:1026862450,phase:2,deny,status:403,log,msg:'CVE-2026-86245 SQLi attempt in companyname'"