CVE-2026-9447: Simple POS and Inventory System SQLi Flaw

CVE-2026-9447 Overview

CVE-2026-9447 is a SQL injection vulnerability in SourceCodester Simple POS and Inventory System 1.0. The flaw resides in the /user/search.php script, where the Name parameter is passed to the underlying database query without proper sanitization. Remote, unauthenticated attackers can manipulate this parameter to inject arbitrary SQL statements. A public proof-of-concept exploit is available, increasing the risk of opportunistic abuse against exposed deployments. The weakness is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact

Unauthenticated remote attackers can manipulate database queries through the Name parameter in /user/search.php, potentially exposing stored user data and application records.

Affected Products

• SourceCodester Simple POS and Inventory System 1.0
• Vulnerable component: /user/search.php
• Vulnerable parameter: Name

Discovery Timeline

• 2026-05-25 - CVE-2026-9447 published to NVD
• 2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-9447

Vulnerability Analysis

The vulnerability is a classic SQL injection in the user search functionality of Simple POS and Inventory System. The Name argument supplied to /user/search.php is concatenated into a SQL statement without parameterization or input validation. Attackers can break out of the intended query context and append arbitrary SQL clauses. Because the endpoint is reachable over the network and requires no authentication or user interaction, exploitation can be automated at scale.

A public proof-of-concept is hosted on GitHub Gist and tracked in VulDB #365428, lowering the barrier to exploitation.

Root Cause

The root cause is the absence of prepared statements or input neutralization in the search routine. User-controlled input from the Name parameter flows directly into a dynamically constructed SQL query. This mirrors the [CWE-74] injection pattern, where untrusted data alters the semantics of a downstream interpreter. SourceCodester applications frequently lack server-side filtering, and this instance is consistent with that pattern.

Attack Vector

An attacker sends a crafted HTTP request to /user/search.php with a malicious payload in the Name parameter. Using UNION-based or boolean-based injection techniques, the attacker can enumerate database schemas, extract user credentials, or modify records. No prior session or privileges are required. The attack is fully remote and can be carried out with standard tooling such as sqlmap.

Refer to the GitHub Gist PoC Code for the published exploitation steps.

Detection Methods for CVE-2026-9447

Indicators of Compromise

• HTTP requests to /user/search.php containing SQL metacharacters such as ', --, UNION SELECT, or OR 1=1 in the Name parameter.
• Web server access logs showing repeated requests to the search endpoint from a single source within a short time window.
• Database error messages or unusually large response sizes returned from the search endpoint.

Detection Strategies

• Inspect web server and application logs for malformed or unusually long values supplied to the Name query parameter on /user/search.php.
• Deploy a Web Application Firewall (WAF) ruleset for SQL injection signatures targeting the affected URI.
• Correlate outbound database errors with inbound HTTP requests to identify injection probing.

Monitoring Recommendations

• Alert on sqlmap user-agent strings or automated scanner fingerprints hitting the application.
• Monitor for anomalous SELECT volumes, schema introspection queries, and information_schema access from the POS application's database user.
• Track failed authentication attempts and account enumeration patterns that may follow successful injection.

How to Mitigate CVE-2026-9447

Immediate Actions Required

• Restrict network exposure of the Simple POS and Inventory System to trusted networks or behind a VPN until a fix is applied.
• Deploy WAF rules to block SQL injection payloads targeting /user/search.php.
• Audit the application database for unauthorized reads, writes, or new accounts.

Patch Information

No official vendor patch has been published for CVE-2026-9447 at the time of this writing. Operators should monitor the SourceCodester project page and VulDB #365428 for updates. Where no upstream fix is available, apply source-level remediation by replacing string concatenation with parameterized queries (for example, PHP PDO prepared statements with bound parameters) and validating input types on the server side.

Workarounds

• Add server-side input validation on Name to reject characters outside an allow-list of alphanumerics and spaces.
• Implement parameterized queries (PDO::prepare with bound parameters or mysqli prepared statements) in /user/search.php.
• Run the application's database account with least-privilege permissions to limit the blast radius of any successful injection.

# Example WAF rule snippet (ModSecurity) to block obvious SQLi on the affected endpoint
SecRule REQUEST_URI "@beginsWith /user/search.php" \
    "phase:2,deny,status:403,id:1009447,\
    msg:'Possible SQLi on Simple POS search',\
    chain"
    SecRule ARGS:Name "@rx (?i)(union(\s|/\*.*\*/)+select|or\s+1=1|--|;|information_schema)" \
        "t:none,t:urlDecodeUni"