CVE-2026-114251: Sales-and-Inventory-System SQLi Vulnerability

CVE-2026-114251 Overview

CVE-2026-114251 is a SQL injection vulnerability in the itsourcecode Sales-and-Inventory-System, affecting the project up to commit 0a3c45a78aaff3601b8cf9ce8ba82ff5c345caac. The flaw resides in the /pages/cust_del.php script, where the ID parameter is passed directly into a SQL query without proper sanitization. An authenticated remote attacker can manipulate the parameter to inject arbitrary SQL statements. The project does not use formal versioning, so there are no numbered affected or fixed releases. The exploit has been publicly disclosed, and the maintainer has not responded to the issue report at the time of publication.

Critical Impact
Remote attackers with low privileges can inject SQL into the customer deletion endpoint, enabling unauthorized read or modification of database records.

Affected Products

itsourcecode Sales-and-Inventory-System up to commit 0a3c45a78aaff3601b8cf9ce8ba82ff5c345caac
Vulnerable component: /pages/cust_del.php
No versioned releases are published by the project

Discovery Timeline

2026-10-21 - CVE-2026-114251 published to NVD
2026-10-21 - Last updated in NVD database

Technical Details for CVE-2026-114251

Vulnerability Analysis

The vulnerability is a classic SQL injection ([CWE-74] Improper Neutralization of Special Elements in Output Used by a Downstream Component) in the PHP file /pages/cust_del.php. This script handles customer deletion operations and accepts the ID argument through an HTTP request. The application concatenates the ID value into a SQL query without parameterization or input validation. An attacker can supply crafted SQL syntax through this parameter to alter query logic. The result is unauthorized access to database contents, including the ability to read, modify, or delete records held by the application.

Because the Sales-and-Inventory-System stores customer, product, inventory, and sales data, successful injection exposes business-sensitive records. The attack is launched remotely over the network and requires only low privileges.

Root Cause

The root cause is unsanitized use of a user-controlled HTTP parameter in a dynamically constructed SQL statement. The cust_del.php endpoint trusts the ID value from the client and concatenates it directly into the delete query. Standard mitigations such as prepared statements, parameterized queries, or input type enforcement are absent.

Attack Vector

An authenticated attacker sends a crafted HTTP request to /pages/cust_del.php with a malicious ID parameter. The payload breaks out of the intended SQL context and appends attacker-controlled clauses such as UNION SELECT statements or boolean conditions. No user interaction is required beyond the attacker submitting the request. The exploit has been publicly disclosed, increasing the likelihood of opportunistic scanning and automated attacks against exposed instances.

Technical details and the public disclosure are referenced in the VulDB entry for CVE-2026-114251 and the GitHub Issue Discussion.

Detection Methods for CVE-2026-114251

Indicators of Compromise

HTTP requests to /pages/cust_del.php containing SQL metacharacters such as single quotes, UNION, SELECT, --, or /* in the ID parameter.
Unexpected database errors, long query execution times, or stack traces originating from the cust_del.php handler.
Unexplained deletion or modification of records in the customer, product, or sales tables.

Detection Strategies

Review web server access logs for anomalous values in the ID query string parameter targeting cust_del.php.
Deploy a web application firewall (WAF) ruleset for SQL injection patterns and alert on blocked or suspicious requests to the Sales-and-Inventory-System host.
Enable database query logging and look for malformed DELETE statements or injected UNION/OR 1=1 clauses tied to the application's database user.

Monitoring Recommendations

Centralize web and database logs and apply correlation rules that flag SQL injection signatures against the vulnerable endpoint.
Alert on authentication activity from the application account followed by abnormal query volume or data exfiltration patterns.
Monitor outbound traffic from the application server for data staging behavior that follows a suspicious request to cust_del.php.

How to Mitigate CVE-2026-114251

Immediate Actions Required

Restrict network access to the Sales-and-Inventory-System to trusted users only, and remove it from public exposure if it is not required to be internet-facing.
Deploy a WAF rule that blocks SQL injection payloads targeting /pages/cust_del.php and the ID parameter.
Audit database logs and backups for signs of prior exploitation, including unauthorized deletions or data reads.

Patch Information

The project does not use versioning, and the maintainer has not responded to the issue report. No official patch is currently available. Administrators should modify cust_del.php locally to use prepared statements with bound parameters (via mysqli or PDO) and enforce strict type validation on the ID value, treating it as an integer only. Track the GitHub Issue Discussion for upstream updates.

Workarounds

Place the application behind an authenticated reverse proxy and restrict access to administrative IP ranges.
Apply a WAF signature or ModSecurity rule that denies non-numeric values on the ID parameter of cust_del.php.
Reduce the database privileges of the application account so that successful injection cannot escalate to broader schema access.

bash

# Example ModSecurity rule blocking non-numeric ID values on the vulnerable endpoint
SecRule REQUEST_URI "@contains /pages/cust_del.php" \
  "chain,phase:2,deny,status:403,id:1002601,msg:'CVE-2026-114251 SQLi guard'"
  SecRule ARGS:ID "!@rx ^[0-9]+$" "t:none"