CVE-2026-92526: Leave Management System 1.0 SQLi Vulnerability

CVE-2026-92526 is a SQL injection flaw in itsourcecode Leave Management System 1.0 affecting the ID parameter in /module/leave/index.php, allowing remote attackers to manipulate database queries. This article covers technical details, affected versions, potential impact, and recommended mitigation strategies.

CVE-2026-92526 Overview

CVE-2026-92526 is a SQL injection vulnerability in itsourcecode Leave Management System 1.0. The flaw resides in the /module/leave/index.php script, where the ID parameter is passed to a database query without proper sanitization. Attackers with low-level authenticated access can manipulate the ID argument to inject arbitrary SQL statements. The issue is exploitable remotely over the network, and a public exploit has been disclosed. The weakness maps to CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Authenticated remote attackers can inject SQL statements through the ID parameter in /module/leave/index.php, potentially exposing or modifying leave management records.

Affected Products

itsourcecode Leave Management System 1.0
Deployments exposing /module/leave/index.php to untrusted users
Downstream forks or copies of the same PHP codebase

Discovery Timeline

2026-09-16 - CVE-2026-92526 published to the National Vulnerability Database
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-92526

Vulnerability Analysis

The vulnerability exists in the leave management module of the itsourcecode Leave Management System. The index.php file inside /module/leave/ accepts an ID request parameter and concatenates it into a backend SQL query. Because the input is neither parameterized nor escaped, a crafted value alters the intended query structure. An authenticated attacker with minimal privileges can leverage this to read database rows, tamper with leave records, or enumerate schema metadata. The exploit has been published, lowering the barrier for opportunistic abuse against exposed installations.

Root Cause

The root cause is missing input neutralization on the ID argument prior to inclusion in a SQL statement. The application relies on direct string concatenation rather than prepared statements or bound parameters. This pattern is characteristic of [CWE-74] injection weaknesses in legacy PHP web applications.

Attack Vector

Exploitation requires network reachability to the application and a low-privileged account. An attacker submits a manipulated request to /module/leave/index.php with a malicious ID value. The injected payload executes within the context of the application's database user. No user interaction is required to trigger the flaw. Refer to the VulDB CVE Report and the GitHub Issue Discussion for reproduction details.

Detection Methods for CVE-2026-92526

Indicators of Compromise

Web server access logs containing requests to /module/leave/index.php with SQL metacharacters such as ', --, UNION, or SLEEP( in the ID parameter.
Database error messages returned to clients referencing syntax errors on the leave module query.
Unexpected read or write activity against leave-related database tables from the application's service account.

Detection Strategies

Deploy web application firewall (WAF) rules that inspect the ID query string parameter for SQL injection patterns.
Enable database query logging and alert on anomalous UNION, INFORMATION_SCHEMA, or time-delay functions originating from the leave management application.
Correlate authentication events with subsequent access to /module/leave/index.php to identify low-privileged accounts probing the endpoint.

Monitoring Recommendations

Monitor outbound egress from the application host for unexpected data volumes that could indicate exfiltration via injection.
Track failed and malformed SQL queries in application logs and forward them to a centralized SIEM for review.
Baseline normal request rates to the leave module and alert on sudden spikes or scripted access patterns.

How to Mitigate CVE-2026-92526

Immediate Actions Required

Restrict access to /module/leave/index.php to trusted networks or authenticated internal users only.
Audit application accounts and revoke unnecessary low-privileged access that could be leveraged against the endpoint.
Review database logs for prior indicators of injection attempts against the leave module.

Patch Information

No vendor patch has been published in the referenced advisories at the time of writing. Consult the IT Source Code Resource and the VulDB Vulnerability Details for updates. Until an upstream fix is available, apply source-level remediation by refactoring the affected query to use parameterized statements.

Workarounds

Introduce a WAF signature that rejects requests to /module/leave/index.php when the ID parameter contains non-numeric characters.
Modify the PHP source to cast ID to an integer with intval($_GET['ID']) before use in any SQL context.
Replace direct query concatenation with prepared statements using PDO or mysqli with bound parameters.
Restrict the database account used by the application to least-privilege read and write operations on required tables only.

bash

# Configuration example: ModSecurity rule to block SQLi patterns on the ID parameter
SecRule REQUEST_URI "@beginsWith /module/leave/index.php" \
    "id:1092526,phase:2,deny,status:403,msg:'Potential SQLi against Leave Management ID param',\
    chain"
  SecRule ARGS:ID "@rx (?i)(union|select|sleep\(|--|';|/\*)" "t:none,t:urlDecodeUni"