CVE-2026-11559: CodeAstro Payroll System SQLi Flaw

CVE-2026-11559 Overview

CVE-2026-11559 is a SQL injection vulnerability in CodeAstro Payroll System 1.0. The flaw resides in the /view_account.php script, where the ID parameter is concatenated into a database query without proper sanitization. Remote attackers with low-level privileges can manipulate this parameter to inject arbitrary SQL statements. The exploit details are publicly available, increasing the risk of opportunistic abuse against exposed deployments. The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Authenticated remote attackers can inject SQL through the ID parameter of view_account.php to read, modify, or exfiltrate payroll data stored in the backend database.

Affected Products

CodeAstro Payroll System 1.0
Component: /view_account.php
Parameter: ID

Discovery Timeline

2026-06-08 - CVE-2026-11559 published to NVD
2026-06-09 - Last updated in NVD database

Technical Details for CVE-2026-11559

Vulnerability Analysis

The vulnerability exists in the view_account.php endpoint of CodeAstro Payroll System 1.0. The script accepts an ID parameter from the HTTP request and embeds it directly into a SQL query executed against the application database. Because the value is neither parameterized nor escaped, attackers can break out of the intended SQL context and append their own clauses.

Successful exploitation can disclose payroll records, modify stored data, or, depending on database privileges, enable broader compromise such as authentication bypass through UNION-based extraction or boolean-based blind techniques. The attack requires network reachability to the application and a low-privilege account, but no user interaction.

The public availability of exploit details lowers the barrier for opportunistic attacks against internet-exposed instances. Organizations running CodeAstro Payroll System should treat the issue as actionable despite the modest CVSS rating.

Root Cause

The root cause is improper neutralization of user-supplied input passed to a SQL interpreter. The ID value is interpolated into the query string rather than bound through a prepared statement, allowing SQL syntax injection. This is a classic CWE-74 / CWE-89 pattern in PHP applications that rely on string concatenation with mysqli_query or equivalent functions.

Attack Vector

An attacker sends a crafted HTTP request to /view_account.php with a malicious ID parameter, for example by appending boolean conditions, UNION SELECT clauses, or time-based payloads. The injected SQL executes within the application's database session, returning data in the response body or via inferred timing differences. Refer to the VulDB Vulnerability Profile and the GitHub CVE Issue Tracker for further technical details.

Detection Methods for CVE-2026-11559

Indicators of Compromise

HTTP requests to /view_account.php containing SQL metacharacters such as ', ", --, ;, or keywords like UNION, SELECT, SLEEP, or BENCHMARK in the ID parameter.
Web server logs showing unusually long or URL-encoded ID values in GET requests.
Anomalous database error messages or 500-class responses originating from view_account.php.
Unexpected outbound queries or large result sets generated from the payroll database under a single session.

Detection Strategies

Deploy web application firewall (WAF) rules that match SQL injection signatures specifically on the ID parameter of /view_account.php.
Enable database query logging and alert on queries from the application user that contain UNION, INFORMATION_SCHEMA, or sleep functions.
Correlate authentication events with high-volume access to view_account.php to identify low-privilege accounts probing the endpoint.

Monitoring Recommendations

Forward web server and database logs into a centralized analytics platform for cross-source correlation.
Establish a baseline for normal request lengths and parameter character sets on view_account.php, then alert on deviations.
Monitor for new or modified rows in sensitive payroll tables outside business hours.

How to Mitigate CVE-2026-11559

Immediate Actions Required

Restrict network access to the CodeAstro Payroll System to trusted internal users while a fix is evaluated.
Audit recent access logs for /view_account.php to identify suspicious ID parameter values.
Rotate database credentials used by the application if injection attempts are observed.
Review payroll database tables for unauthorized modifications.

Patch Information

No vendor patch is referenced in the published advisory at this time. Consult the CodeAstro Security Resources and the VulDB CVE-2026-11559 Listing for updates. Until an official fix is available, apply compensating controls described below.

Workarounds

Place the application behind a WAF and enable SQL injection signatures, with a specific rule blocking non-numeric values in the ID parameter of view_account.php.
Modify view_account.php to validate that ID is a strict integer before any database call, rejecting all other input.
Refactor the underlying query to use parameterized statements (for example, mysqli prepared statements or PDO with bound parameters).
Enforce least-privilege on the database account used by the application so it cannot read or modify tables outside its required scope.

bash

# Example nginx rule to enforce numeric-only ID values on view_account.php
location = /view_account.php {
    if ($arg_ID !~ "^[0-9]+$") {
        return 400;
    }
    include fastcgi_params;
    fastcgi_pass unix:/var/run/php-fpm.sock;
}