CVE-2026-3262: ASP.NET Core Inventory System RCE Flaw

CVE-2026-3262 Overview

A vulnerability has been identified in go2ismail Asp.Net-Core-Inventory-Order-Management-System up to version 9.20250118. The flaw exists in an unknown function of the Administrative Interface component, where improper handling of redirect responses leads to an Execution After Redirect (EAR) vulnerability. This weakness allows attackers to bypass authentication or authorization controls by continuing to execute code after a redirect instruction, potentially enabling unauthorized access to administrative functions.

Critical Impact

Remote attackers with low-privilege access can exploit this vulnerability to bypass client-side redirect-based access controls, potentially escalating privileges within the administrative interface.

Affected Products

• go2ismail Asp.Net-Core-Inventory-Order-Management-System up to version 9.20250118

Discovery Timeline

• 2026-02-26 - CVE CVE-2026-3262 published to NVD
• 2026-02-26 - Last updated in NVD database

Technical Details for CVE-2026-3262

Vulnerability Analysis

This vulnerability is classified as CWE-698 (Execution After Redirect), a weakness that occurs when a web application fails to properly terminate execution after issuing a redirect response to the client. In the context of the Asp.Net Core Inventory Order Management System, the Administrative Interface relies on client-side redirects to enforce access control, but the server-side code continues processing the request even after sending the redirect header.

The flaw enables an attacker to intercept or ignore the redirect instruction and continue interacting with protected functionality. Since the exploit has been publicly disclosed and the vendor did not respond to early notification attempts, systems running affected versions remain at elevated risk.

Root Cause

The root cause stems from improper implementation of access control logic within the Administrative Interface. Instead of terminating request processing server-side after determining that a user lacks authorization, the application merely sends a redirect response while continuing to execute subsequent code. This architectural flaw means that the redirect acts as a suggestion rather than an enforcement mechanism, allowing attackers who intercept HTTP responses to bypass the intended security control.

Attack Vector

The attack can be launched remotely over the network. An attacker with low-privilege credentials can exploit this vulnerability by:

1. Authenticating to the application with minimal privileges
2. Sending requests to administrative endpoints that would normally trigger redirects for unauthorized users
3. Intercepting or ignoring the redirect response using browser developer tools or proxy software
4. Continuing to access the response data or triggering server-side actions that execute before the redirect takes effect

This client-side redirect bypass technique allows privilege escalation by accessing administrative functions that should be restricted. For detailed technical information, see the GitHub Privilege Escalation Advisory.

Detection Methods for CVE-2026-3262

Indicators of Compromise

• HTTP requests to administrative endpoints from users with insufficient privileges that receive redirect responses but contain execution evidence in server logs
• Unusual access patterns showing repeated requests to protected administrative functions followed by redirect responses
• Evidence of intercepted or modified HTTP responses in network traffic analysis
• Successful data retrieval or state changes from administrative functions by non-administrative users

Detection Strategies

• Implement server-side logging to track when redirect responses are issued along with any subsequent code execution
• Monitor for HTTP requests that bypass expected client-side redirect behavior using web application firewalls
• Analyze access logs for patterns indicating redirect bypass attempts against administrative endpoints
• Deploy application security monitoring to detect privilege escalation attempts

Monitoring Recommendations

• Enable detailed request/response logging for all Administrative Interface endpoints
• Configure alerts for administrative actions performed by non-administrative user sessions
• Implement real-time monitoring of authentication and authorization events
• Review access control logs regularly for anomalous redirect-related activity

How to Mitigate CVE-2026-3262

Immediate Actions Required

• Restrict network access to the Administrative Interface to trusted IP addresses or VPN connections only
• Implement additional server-side authorization checks that terminate execution before any sensitive operations
• Consider disabling the affected Administrative Interface functionality until a patch is available
• Apply web application firewall rules to block suspicious redirect bypass attempts

Patch Information

The vendor was contacted early about this disclosure but did not respond. As of the last NVD update on 2026-02-26, no official patch has been released. Organizations using the affected software should monitor the VulDB entry and the project's GitHub repository for security updates.

Workarounds

• Modify server-side code to ensure execution terminates immediately after redirect responses using Response.End() or equivalent mechanisms
• Implement server-side access control checks that block unauthorized requests before any processing occurs
• Add middleware or filters that validate user authorization at the earliest stage of request processing
• Use role-based access control enforced at the controller or action level rather than relying on redirects

For environments where code modification is possible, ensure all redirect-based access control logic follows the pattern of validating authorization, returning the redirect response, and terminating execution immediately:

# Recommended pattern for ASP.NET Core authorization
# Ensure Response.Redirect is followed by return statement
if (!User.IsInRole("Admin"))
{
    Response.Redirect("/AccessDenied");
    return; // Critical: terminate execution after redirect
}
// Administrative logic only executes if user is authorized