CVE-2026-1619 Overview
CVE-2026-1619 is an Authorization Bypass Through User-Controlled Key vulnerability (CWE-639) affecting Universal Software Inc. FlexCity/Kiosk software. This vulnerability allows attackers to exploit trusted identifiers, enabling unauthorized access to resources that should be protected by access controls. By manipulating user-controlled key values, attackers can bypass authorization mechanisms and potentially access or modify data belonging to other users.
Critical Impact
This authorization bypass vulnerability enables attackers to exploit trusted identifiers, potentially allowing unauthorized access to sensitive kiosk data and functions through manipulation of user-controlled keys.
Affected Products
- Universal Software Inc. FlexCity/Kiosk versions 1.0 through 1.0.35
- FlexCity/Kiosk version 1.0.36 and later contain the security fix
Discovery Timeline
- February 13, 2026 - CVE-2026-1619 published to NVD
- February 13, 2026 - Last updated in NVD database
Technical Details for CVE-2026-1619
Vulnerability Analysis
This vulnerability falls under CWE-639: Authorization Bypass Through User-Controlled Key, commonly known as Insecure Direct Object Reference (IDOR). The FlexCity/Kiosk application fails to properly validate that a user has authorization to access a resource before processing requests that use user-supplied identifiers.
When an application uses user-controllable keys (such as record IDs, user IDs, or session tokens) to directly reference internal objects without proper authorization checks, attackers can manipulate these values to access resources belonging to other users or escalate their privileges within the system.
The network-based attack vector combined with low privileges required means that any authenticated user could potentially exploit this vulnerability to access unauthorized resources, leading to confidentiality and integrity impacts on the affected kiosk systems.
Root Cause
The root cause of this vulnerability is insufficient authorization validation when processing requests that contain user-controlled identifiers. The FlexCity/Kiosk application directly uses user-supplied key values to reference internal objects without verifying that the requesting user has legitimate access rights to those resources. This allows authenticated users to enumerate or guess valid identifiers and access resources outside their authorized scope.
Attack Vector
The vulnerability is exploitable over the network with low attack complexity. An attacker with low-level privileges (authenticated user) can manipulate request parameters containing object identifiers to access or modify data belonging to other users or access restricted functionality.
The attack typically involves:
- Authenticating to the FlexCity/Kiosk application with valid credentials
- Intercepting or observing requests that contain user-controlled identifiers
- Modifying these identifier values to reference other users' resources
- Submitting the manipulated requests to access unauthorized data
Since no user interaction is required and the vulnerability affects both confidentiality and integrity, successful exploitation could lead to unauthorized disclosure or modification of sensitive kiosk data.
Detection Methods for CVE-2026-1619
Indicators of Compromise
- Unusual patterns of sequential or enumerated resource ID access attempts by single users
- Access log entries showing users accessing resources outside their normal scope
- Failed authorization attempts followed by successful access to different resource IDs
- Anomalous parameter manipulation in HTTP request logs
Detection Strategies
- Implement logging and monitoring for all resource access attempts with user-controlled identifiers
- Deploy Web Application Firewall (WAF) rules to detect parameter tampering and IDOR attack patterns
- Enable application-level auditing to track authorization decisions and failures
- Monitor for rapid sequential requests with incrementing or enumerated ID values
Monitoring Recommendations
- Configure alerts for users accessing resources outside their typical access patterns
- Implement rate limiting and anomaly detection for API endpoints using direct object references
- Review access logs regularly for signs of unauthorized resource enumeration
- Set up real-time monitoring for failed authorization attempts across the kiosk infrastructure
How to Mitigate CVE-2026-1619
Immediate Actions Required
- Upgrade FlexCity/Kiosk to version 1.0.36 or later immediately
- Review access logs for signs of exploitation or unauthorized access attempts
- Implement additional access controls at the network level to limit exposure
- Enable enhanced logging to capture detailed authorization decisions
Patch Information
Universal Software Inc. has addressed this vulnerability in FlexCity/Kiosk version 1.0.36. Organizations should upgrade to this version or later to remediate the vulnerability. For additional details, refer to the USOM Security Notification.
Workarounds
- Implement network segmentation to limit access to FlexCity/Kiosk systems to trusted networks only
- Deploy a Web Application Firewall (WAF) with rules to detect and block IDOR attack patterns
- Enable strict session validation and implement secondary authorization checks at the application layer
- Restrict user privileges to the minimum required for their role until patching is complete
# Example: Network-level access restriction for FlexCity/Kiosk
# Restrict access to kiosk management interfaces to trusted IPs only
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
