CVE-2026-93531: HospitalManagement CSRF Vulnerability

CVE-2026-93531 Overview

CVE-2026-93531 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the gedelumbung HospitalManagement application through commit c2d45543789a3887067d3915f69d44cfc2cf76a8. The project uses a rolling release model, so specific fixed version identifiers are not published. An unauthenticated remote attacker can craft a malicious web page that causes an authenticated victim's browser to submit unintended state-changing requests to the application. Public exploit details have been disclosed. The upstream project was notified through a GitHub issue but has not responded at the time of publication.

Critical Impact
Attackers can force authenticated users to perform unwanted actions in the HospitalManagement application by luring them to a crafted page, producing limited integrity impact on application data.

Affected Products

gedelumbung HospitalManagement (rolling release)
Builds up to and including commit c2d45543789a3887067d3915f69d44cfc2cf76a8
Deployments exposing the application to browsers with active user sessions

Discovery Timeline

2026-09-18 - CVE-2026-93531 published to the National Vulnerability Database (NVD)
2026-09-18 - Last updated in NVD database

Technical Details for CVE-2026-93531

Vulnerability Analysis

The vulnerability is a Cross-Site Request Forgery weakness in the HospitalManagement web application. The application accepts state-changing HTTP requests from authenticated sessions without verifying that the request originated from a legitimate first-party workflow. An attacker who convinces a logged-in user to visit a malicious page can trigger requests that reuse the victim's session cookies. Because the browser attaches those cookies automatically, the server processes the forged request as if the user initiated it. User interaction is required, and the resulting impact is limited to integrity of application data such as hospital records, patient entries, or user configuration handled by the affected endpoints.

Root Cause

The root cause is the absence of anti-CSRF protections on sensitive request handlers. The application does not appear to validate synchronizer tokens, SameSite cookie attributes, or Origin/Referer headers before executing privileged actions. Any endpoint that mutates state through a predictable request format can be invoked cross-origin.

Attack Vector

Exploitation is remote and requires an authenticated victim to interact with attacker-controlled content, typically by loading a crafted HTML page or following a phishing link. The malicious page issues a hidden form submission or JavaScript-driven request to the vulnerable HospitalManagement endpoint. Because the request carries the victim's session cookies, the server accepts and executes it. See the GitHub Issue #6 Discussion and VulDB CVE-2026-93531 for technical references.

Detection Methods for CVE-2026-93531

Indicators of Compromise

Unexpected state changes (new users, altered patient records, modified configuration) tied to authenticated sessions.
Web server access logs showing POST or state-changing GET requests with Referer headers pointing to unrelated external domains.
Session activity where sensitive requests occur without a preceding navigation to the corresponding in-app form.

Detection Strategies

Inspect HTTP request logs for missing or absent anti-CSRF token parameters on endpoints that modify data.
Correlate authenticated user actions with browser referrer chains to identify requests originating from external origins.
Enable web application firewall (WAF) rules that flag cross-origin form submissions to sensitive HospitalManagement routes.

Monitoring Recommendations

Alert on anomalous request patterns targeting administrative or record-modification endpoints during off-hours.
Monitor authentication logs for sessions that generate high-value writes shortly after visiting untrusted external referrers.
Track outbound traffic from clinician workstations to unfamiliar domains that may host CSRF payloads.

How to Mitigate CVE-2026-93531

Immediate Actions Required

Restrict access to the HospitalManagement application to trusted networks or VPN users until a fix is available.
Instruct authenticated users to log out when finished and avoid browsing untrusted sites in the same session.
Deploy WAF rules that require a valid Origin or Referer header matching the application host on state-changing requests.

Patch Information

No vendor patch has been published. The project uses a rolling release model and, according to the CVE record, has not responded to the issue report. Track the GitHub Hospital Management Repository and GitHub Issue #6 Discussion for upstream updates.

Workarounds

Implement anti-CSRF synchronizer tokens on all state-changing endpoints in a local fork if source modification is feasible.
Set session cookies with the SameSite=Strict or SameSite=Lax attribute to block cross-site cookie transmission.
Enforce re-authentication for sensitive operations such as record deletion or account changes.
Educate users to avoid clicking untrusted links while logged into the application.

bash

# Example Nginx configuration to block cross-origin state-changing requests
map $http_origin $allowed_origin {
    default 0;
    "https://hospital.example.local" 1;
}

server {
    location / {
        if ($request_method ~ ^(POST|PUT|DELETE|PATCH)$) {
            if ($allowed_origin = 0) { return 403; }
        }
        proxy_pass http://hospitalmanagement_backend;
    }
}