CVE-2026-78143: Barangay Resident Profiling System SQLi

CVE-2026-78143 is a SQL injection vulnerability in Barangay Resident Profiling Management System 1.0 affecting the Resident Search Functionality. Attackers can exploit this remotely through the Search parameter. This article covers technical details, affected versions, impact assessment, and mitigation strategies.

CVE-2026-78143 Overview

CVE-2026-78143 is a SQL injection vulnerability in the code-projects Barangay Resident Profiling Management System 1.0. The flaw resides in the Resident Search Functionality implemented in residents.php, where the Search parameter is passed directly into a database query without proper sanitization. Remote attackers can exploit the issue without authentication or user interaction. A public proof-of-concept has been disclosed, increasing the likelihood of opportunistic exploitation against exposed instances. The vulnerability maps to [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote, unauthenticated attackers can inject arbitrary SQL through the Search parameter in residents.php, exposing resident records and potentially the entire backing database.

Affected Products

code-projects Barangay Resident Profiling Management System 1.0
Component: Resident Search Functionality (residents.php)
Parameter: Search

Discovery Timeline

2026-08-23 - CVE-2026-78143 published to NVD
2026-08-24 - Last updated in NVD database

Technical Details for CVE-2026-78143

Vulnerability Analysis

The vulnerability affects the resident search feature of the Barangay Resident Profiling Management System 1.0. The Search request parameter processed by residents.php is concatenated into a SQL statement without parameterization or input validation. An attacker can supply crafted SQL fragments that alter the intended query logic. This yields the ability to read arbitrary rows, enumerate schema information, and, depending on database privileges, modify or delete records.

The issue is remotely reachable over the network and does not require authentication or user interaction. A public exploit script has been published on GitHub, lowering the technical barrier for attackers. Because the application handles resident personal data, successful exploitation results in disclosure of personally identifiable information (PII). Additional references are available at the VulDB CVE-2026-78143 Details entry.

Root Cause

The root cause is improper neutralization of user-supplied input before it is embedded into a SQL query [CWE-74]. The Search parameter reaches the query builder as concatenated string data instead of being bound as a parameter. No allow-list, type check, or escaping routine is applied prior to query execution.

Attack Vector

An attacker sends an HTTP request to the residents.php endpoint containing a manipulated Search value. The injected payload can use UNION-based, boolean-based, or time-based techniques to extract data from the underlying database. Because the endpoint is reachable without credentials, the attack works against any internet-exposed deployment. Technical details of the payload structure are available in the GitHub Gist PoC Script.

Detection Methods for CVE-2026-78143

Indicators of Compromise

HTTP requests to residents.php where the Search parameter contains SQL metacharacters such as ', --, UNION SELECT, SLEEP(, or OR 1=1.
Web server or database logs showing unusually long response times or repeated errors originating from queries against the residents table.
Outbound data transfer spikes from the application server following requests to the search endpoint.

Detection Strategies

Deploy web application firewall (WAF) signatures targeting SQL injection patterns on the Search parameter of residents.php.
Enable database query logging and alert on queries containing tautologies, stacked statements, or information_schema references originating from the application account.
Correlate access logs with authentication logs to identify unauthenticated clients repeatedly probing the search endpoint.

Monitoring Recommendations

Monitor for repeated 500-series HTTP responses from residents.php, which often accompany injection probing.
Track request rate and payload entropy on the Search parameter to surface automated exploitation attempts.
Review database audit logs for schema enumeration activity such as reads against information_schema.tables or information_schema.columns.

How to Mitigate CVE-2026-78143

Immediate Actions Required

Restrict network exposure of the Barangay Resident Profiling Management System to trusted networks or place it behind a VPN until a fix is available.
Deploy WAF rules that block SQL metacharacters and known SQL injection payloads targeting the Search parameter.
Rotate database credentials used by the application and reduce the associated database account to least-privilege read access where feasible.

Patch Information

At the time of publication, no vendor patch has been referenced in the NVD entry. Administrators should monitor the Code Projects Resource Hub for updated releases and consult the VulDB Vulnerability #394526 record for tracking remediation status.

Workarounds

Modify residents.php to use parameterized queries or prepared statements (for example, PDO with bound parameters in PHP) instead of string concatenation for the Search value.
Apply strict server-side input validation that rejects non-alphanumeric characters in the Search field where the business logic allows.
Configure the application database user with read-only privileges scoped to the residents table to limit the blast radius of successful injection.

bash

# Example: enforce a temporary WAF rule (ModSecurity syntax)
SecRule ARGS:Search "@rx (?i)(union(\s|\+)+select|sleep\(|--|;|/\*|information_schema)" \
    "id:1078143,phase:2,deny,status:403,msg:'CVE-2026-78143 SQLi attempt on residents.php Search parameter'"