CVE-2026-7093: Invoice System Laravel Auth Bypass Flaw

CVE-2026-7093 Overview

A vulnerability has been identified in code-projects Invoice System in Laravel 1.0 that allows improper authorization through the manipulation of the ID argument in the /invoice/ endpoint. This Insecure Direct Object Reference (IDOR) vulnerability enables authenticated attackers to access or modify invoice data belonging to other users by manipulating the ID parameter in requests to the Invoice Endpoint.

Critical Impact

Authenticated attackers can bypass authorization controls to access, view, or potentially modify invoice records belonging to other users, leading to unauthorized data exposure and potential data integrity issues.

Affected Products

• code-projects Invoice System in Laravel version 1.0
• Applications utilizing the vulnerable /invoice/ endpoint

Discovery Timeline

• 2026-04-27 - CVE-2026-7093 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7093

Vulnerability Analysis

This vulnerability represents a classic Insecure Direct Object Reference (IDOR) flaw classified under CWE-266 (Incorrect Privilege Assignment). The Invoice System fails to properly validate whether the authenticated user has legitimate access to the requested invoice resource before returning or processing the data. When a user submits a request to the /invoice/ endpoint with a specific ID parameter, the application retrieves and returns the corresponding invoice without verifying ownership or access permissions.

The vulnerability is exploitable remotely over the network and requires low-privilege authentication to execute. While the attack complexity is low and requires no user interaction, the impact is limited to confidentiality, integrity, and availability of individual invoice records rather than complete system compromise. The exploit has been publicly disclosed, increasing the risk of exploitation in the wild.

Root Cause

The root cause of this vulnerability lies in insufficient authorization checks within the Invoice Endpoint component. The application accepts user-supplied ID values and processes them without validating that the requesting user has appropriate permissions to access the specified resource. This represents a failure to implement proper access control at the object level, allowing horizontal privilege escalation between users of the same privilege level.

Attack Vector

The attack is conducted remotely over the network by an authenticated user. The attacker manipulates the ID parameter in requests to the /invoice/ endpoint to enumerate and access invoice records that should be restricted to other users. By iterating through sequential or predictable ID values, an attacker can potentially access all invoice data in the system.

The vulnerability can be exploited by modifying the ID parameter in the /invoice/ endpoint URL. An authenticated attacker can change the ID value to reference invoices belonging to other users, bypassing the intended authorization controls. For detailed technical analysis, refer to the GitHub Gist Example Code and VulDB Vulnerability #359668.

Detection Methods for CVE-2026-7093

Indicators of Compromise

• Unusual patterns of sequential ID access in /invoice/ endpoint requests from single user sessions
• Access logs showing users viewing invoices they did not create or are not associated with
• Abnormal volume of requests to the Invoice Endpoint with varying ID parameters
• Failed authorization attempts followed by successful access with modified parameters

Detection Strategies

• Implement application-level logging to track invoice access patterns and flag anomalous behavior
• Deploy Web Application Firewall (WAF) rules to detect parameter manipulation patterns
• Configure intrusion detection systems to alert on enumeration-style request patterns
• Monitor authentication logs for accounts exhibiting suspicious invoice access behavior

Monitoring Recommendations

• Enable detailed access logging for the /invoice/ endpoint including user session, requested ID, and response status
• Set up alerts for high-frequency requests to invoice resources from individual user accounts
• Implement real-time monitoring for cross-user resource access attempts
• Review access logs regularly for patterns indicative of IDOR exploitation

How to Mitigate CVE-2026-7093

Immediate Actions Required

• Audit all code paths accessing the /invoice/ endpoint to implement proper authorization checks
• Implement server-side validation to verify the authenticated user has permission to access the requested invoice
• Consider using indirect object references (such as GUIDs or session-specific mappings) instead of sequential IDs
• Review and remediate similar authorization patterns throughout the application

Patch Information

No official vendor patch information is currently available. Organizations should implement the authorization controls described in the workarounds section until an official fix is released. Monitor the Code Projects Resource Hub for updates and security advisories. Additional technical details are available at VulDB Submission #800389.

Workarounds

• Implement middleware or policy-based authorization checks that verify resource ownership before processing requests
• Add server-side validation in the Invoice controller to confirm the authenticated user owns or has explicit access to the requested invoice
• Use Laravel's built-in authorization features (Policies and Gates) to enforce proper access control
• Consider implementing rate limiting on the endpoint to slow enumeration attacks

# Example Laravel middleware authorization check (conceptual)
# Add to app/Http/Middleware or use Laravel Policies
# Verify invoice ownership before allowing access:
# - Check if Auth::user()->id matches invoice->user_id
# - Implement Policy: php artisan make:policy InvoicePolicy
# - Apply authorization in controller: $this->authorize('view', $invoice);