CVE-2026-102846: HospitalManagement Auth Bypass Vulnerability

CVE-2026-102846 Overview

CVE-2026-102846 is an improper authorization vulnerability [CWE-266] in gedelumbung HospitalManagement, an open-source hospital administration application. The flaw resides in the simpan function of application/modules/admin/controllers/sistem.php, part of the Configuration Handler component. Attackers can manipulate the tipe, title, and content_setting parameters to bypass authorization checks on configuration operations. The issue affects the codebase up to commit c2d45543789a3887067d3915f69d44cfc2cf76a8. Because the project follows a rolling release model, no discrete versioned patch has been published. The exploit is publicly disclosed, and the maintainers had not responded to the reporter at the time of publication.

Critical Impact

Authenticated remote attackers can alter system configuration settings by abusing improper authorization checks in the sistem.php::simpan handler.

Affected Products

• gedelumbung HospitalManagement (rolling release) up to commit c2d45543789a3887067d3915f69d44cfc2cf76a8
• Component: Configuration Handler (application/modules/admin/controllers/sistem.php)
• Function: simpan

Discovery Timeline

• 2026-09-30 - CVE-2026-102846 published to NVD
• 2026-09-30 - Last updated in NVD database

Technical Details for CVE-2026-102846

Vulnerability Analysis

The vulnerability exists in the simpan (save) function of the administrative sistem.php controller. This function processes configuration updates submitted through the Configuration Handler. It accepts the tipe, title, and content_setting arguments without enforcing correct authorization checks on the requesting user. As a result, a user with valid session credentials but without administrative privilege can invoke configuration-changing operations that should be restricted. The weakness is classified as [CWE-266] Incorrect Privilege Assignment. Successful exploitation results in limited confidentiality, integrity, and availability impact scoped to the affected application. A public proof-of-concept is referenced in the associated GitHub issue and VulDB entries.

Root Cause

The root cause is missing or insufficient authorization enforcement in the simpan controller action. The application relies on lower-privilege session context to reach the endpoint but does not re-verify that the caller has administrative rights before applying configuration writes. This design gap allows attribute-controlled parameters to be persisted by non-administrative users.

Attack Vector

The attack is remote and network-based. It requires an authenticated session with elevated but non-administrative access, and no user interaction. An attacker crafts an HTTP request targeting the sistem.php::simpan endpoint and supplies attacker-controlled values for tipe, title, and content_setting. The request is accepted and the configuration is written. No verified exploit code is available for reproduction in this article. See the GitHub Issue #12 and VulDB CVE-2026-102846 references for technical details.

Detection Methods for CVE-2026-102846

Indicators of Compromise

• HTTP POST requests to application/modules/admin/controllers/sistem.php invoking the simpan action from non-administrative user sessions.
• Unexpected modifications to configuration records containing manipulated tipe, title, or content_setting values.
• Audit-log entries showing configuration changes attributed to accounts that lack administrative role assignments.

Detection Strategies

• Correlate web-server access logs with application role assignments to flag configuration writes issued by non-admin identities.
• Deploy web application firewall (WAF) rules that inspect requests to the sistem.php controller and require an authenticated administrative session context.
• Baseline expected configuration change frequency and alert on out-of-band modifications outside change windows.

Monitoring Recommendations

• Enable verbose logging in the application's admin module and forward events to a centralized SIEM for correlation.
• Monitor database tables backing system settings for unauthorized writes and generate alerts on integrity drift.
• Track authentication events tied to accounts that subsequently invoke administrative endpoints.

How to Mitigate CVE-2026-102846

Immediate Actions Required

• Restrict network access to the HospitalManagement admin interface to trusted management networks only.
• Review all accounts with any level of authenticated access and remove unnecessary privileges pending a fix.
• Audit recent configuration changes for evidence of unauthorized modification and revert suspicious entries.

Patch Information

The project operates on a rolling release model and has not published a fixed commit. According to the vulnerability report, the maintainer had not responded to the issue at the time of publication. Track the GitHub Project Repository and GitHub Issue #12 for a remediation commit.

Workarounds

• Add server-side authorization middleware that verifies administrative role membership before allowing execution of the simpan action.
• Place the application behind a reverse proxy that enforces additional access controls on /admin/sistem/* routes.
• Temporarily disable the Configuration Handler admin endpoint if configuration changes are not required during the mitigation period.

# Example nginx access restriction for the admin controller
location ~* /admin/sistem/ {
    allow 10.0.0.0/8;      # trusted management network
    deny  all;
    proxy_pass http://hospitalmanagement_backend;
}