CVE-2026-94151: Omega HRM OS Authentication Bypass Flaw

CVE-2026-94151 Overview

CVE-2026-94151 is a missing authentication vulnerability affecting Omega Solution HRM OS versions up to 20260717. The flaw resides in the Role Permission API, specifically in the /role-permission/permission endpoint. An attacker can manipulate the roleId argument remotely without providing credentials. The weakness is classified under CWE-287: Improper Authentication. A public exploit has been disclosed, increasing the likelihood of opportunistic attacks. The vendor was contacted early in the disclosure process but did not respond.

Critical Impact
Remote attackers can access role permission functionality without authentication, exposing role-based access control data in affected Omega Solution HRM OS deployments.

Affected Products

Omega Solution HRM OS versions up to 20260717
Component: Role Permission API (/role-permission/permission)
Vulnerable parameter: roleId

Discovery Timeline

2026-09-21 - CVE-2026-94151 published to the National Vulnerability Database
2026-09-21 - Last updated in NVD database

Technical Details for CVE-2026-94151

Vulnerability Analysis

The vulnerability exists in the Role Permission API of Omega Solution HRM OS. The /role-permission/permission endpoint fails to enforce authentication before processing requests that include the roleId argument. This allows unauthenticated remote actors to interact with role-permission functionality that should be restricted to authorized administrators.

Because HRM (Human Resource Management) systems commonly store personnel and access-control metadata, exposure of role permission data can facilitate reconnaissance for follow-on attacks. Public availability of a proof-of-concept lowers the technical barrier for exploitation. See the GitHub Issue #22 Discussion for technical context.

Root Cause

The root cause is missing authentication [CWE-287] on the /role-permission/permission route. The application dispatches the request to handler logic that consumes the roleId parameter without validating the caller's session, token, or role membership. Access control checks either are absent or are applied inconsistently across the API surface.

Attack Vector

Exploitation is performed over the network with low attack complexity. An attacker sends a crafted HTTP request to the vulnerable endpoint with a manipulated roleId value. No user interaction and no prior authentication are required. Additional technical detail is available in the VulDB CVE-2026-94151 Overview.

Detection Methods for CVE-2026-94151

Indicators of Compromise

Unauthenticated HTTP requests to /role-permission/permission from external or unexpected internal sources
Requests containing enumerated or sequential roleId values indicating parameter fuzzing
Access to the Role Permission API from IP addresses not associated with administrative workstations

Detection Strategies

Deploy web application firewall rules that require an authenticated session cookie or bearer token for any request to /role-permission/
Correlate access logs to identify anonymous or session-less requests reaching role-management endpoints
Baseline normal administrative traffic patterns and alert on deviations targeting the Role Permission API

Monitoring Recommendations

Enable verbose application logging for the Role Permission API, including source IP, session identifier, and roleId values
Forward HRM OS access logs to a centralized SIEM for correlation with authentication events
Alert on HTTP 200 responses returned to requests that lack an authentication header

How to Mitigate CVE-2026-94151

Immediate Actions Required

Restrict network access to Omega Solution HRM OS management interfaces using firewall or VPN controls
Block external access to /role-permission/permission at the reverse proxy or WAF layer until a fix is available
Audit recent access logs for unauthenticated requests to the Role Permission API and investigate any anomalies
Rotate role assignments and review privileged accounts to identify unauthorized changes

Patch Information

No vendor patch is currently referenced in the advisory. The vendor did not respond to disclosure attempts. Track the VulDB Vulnerability #408065 entry for updates and contact Omega Solution directly for remediation guidance.

Workarounds

Place the HRM OS application behind an authenticating reverse proxy that enforces session validation before forwarding requests
Apply network segmentation so the application is reachable only from trusted administrative networks
Implement access control rules at the proxy layer that deny requests to /role-permission/* without a valid session token

bash

# Example NGINX configuration restricting access to the vulnerable endpoint
location /role-permission/ {
    allow 10.0.0.0/8;        # Trusted administrative network
    deny all;
    auth_request /_auth;      # Require upstream authentication check
    proxy_pass http://hrm_backend;
}