CVE-2026-2095: Agentflow Authentication Bypass Flaw

CVE-2026-2095 Overview

CVE-2026-2095 is a critical Authentication Bypass vulnerability affecting Agentflow, a workflow automation platform developed by Flowring. This vulnerability allows unauthenticated remote attackers to exploit a specific functionality to obtain arbitrary user authentication tokens and log into the system as any user, including administrative accounts.

The flaw is classified under CWE-288 (Authentication Bypass Using an Alternate Path or Channel), indicating that the application fails to properly enforce authentication requirements across all access paths, enabling attackers to circumvent normal authentication mechanisms entirely.

Critical Impact

Unauthenticated attackers can obtain authentication tokens for any user account, enabling complete account takeover and unauthorized system access without requiring credentials.

Affected Products

• Flowring Agentflow (specific version information not disclosed)

Discovery Timeline

• 2026-02-10 - CVE-2026-2095 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2026-2095

Vulnerability Analysis

This authentication bypass vulnerability represents a fundamental failure in the application's access control implementation. The flaw allows remote attackers to interact with a specific functionality within Agentflow that does not properly validate authentication state before issuing user tokens.

The vulnerability enables attackers to request and receive valid authentication tokens for arbitrary user accounts without providing legitimate credentials. Once an attacker obtains a victim's authentication token, they can impersonate that user and gain full access to their account privileges, data, and capabilities within the Agentflow system.

This type of vulnerability is particularly dangerous in workflow automation platforms like Agentflow, where compromised administrative accounts could lead to manipulation of business processes, data exfiltration, or further lateral movement within an organization's infrastructure.

Root Cause

The root cause of CVE-2026-2095 is an authentication bypass through an alternate path (CWE-288). The vulnerable functionality within Agentflow fails to verify that requests for authentication tokens originate from properly authenticated sessions. This architectural weakness allows the token generation or retrieval mechanism to be accessed without completing the standard authentication flow.

This type of flaw typically occurs when developers implement authentication checks inconsistently across different application endpoints, or when certain administrative or utility functions are inadvertently exposed without proper access controls.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no user interaction and no prior authentication. An attacker can exploit this vulnerability remotely by:

1. Identifying the vulnerable endpoint or functionality within the Agentflow application
2. Crafting requests to the vulnerable functionality that specify a target user account
3. Receiving a valid authentication token for the specified user
4. Using the obtained token to authenticate to the application as the victim user

The attack does not require any privileges, special access conditions, or user interaction, making it trivially exploitable once the specific vulnerable functionality is identified. Due to the nature of this vulnerability involving authentication token manipulation, specific exploitation details are not provided to prevent malicious use.

Detection Methods for CVE-2026-2095

Indicators of Compromise

• Unusual authentication token generation requests originating from unexpected IP addresses or without preceding login attempts
• Multiple user accounts being accessed from the same source IP within a short timeframe
• Authentication events for user accounts without corresponding credential submission events
• Anomalous access patterns to administrative accounts or sensitive workflow functions

Detection Strategies

• Implement monitoring for authentication token generation events that lack corresponding credential validation
• Deploy web application firewall (WAF) rules to detect and block suspicious requests to token-related endpoints
• Enable detailed logging for all authentication-related functions within Agentflow
• Monitor for patterns of sequential account access that may indicate token enumeration or abuse

Monitoring Recommendations

• Enable verbose authentication logging within Agentflow to capture all token issuance events
• Implement SIEM correlation rules to detect authentication anomalies such as tokens being used without login events
• Monitor network traffic for unusual patterns targeting Agentflow authentication endpoints
• Set up alerts for administrative account access from new or untrusted IP addresses

How to Mitigate CVE-2026-2095

Immediate Actions Required

• Review the Flowring Forum Discussion for vendor-provided remediation guidance
• Restrict network access to Agentflow instances to trusted IP ranges using firewall rules
• Implement additional authentication layers such as VPN or reverse proxy authentication in front of Agentflow
• Audit user accounts and sessions for signs of unauthorized access

Patch Information

Organizations should consult the official Flowring security advisories and the TW-CERT Cybersecurity Report #10700 for detailed patch information and remediation instructions. The TW-CERT Cybersecurity Report #10699 (in Chinese) may contain additional technical details.

Contact Flowring support directly to obtain the latest security patches and verify your installation is updated to a non-vulnerable version.

Workarounds

• Place Agentflow behind a VPN or require network-level authentication before accessing the application
• Implement IP whitelisting to restrict access to known trusted addresses only
• Deploy a web application firewall with rules to detect and block authentication bypass attempts
• Disable or restrict access to the vulnerable functionality if identified and not business-critical
• Enable multi-factor authentication if supported to provide an additional layer of protection

# Example network restriction using iptables to limit Agentflow access
# Replace <TRUSTED_NETWORK> with your organization's IP range
# Replace <AGENTFLOW_PORT> with the application port (commonly 80/443)

iptables -A INPUT -p tcp --dport <AGENTFLOW_PORT> -s <TRUSTED_NETWORK> -j ACCEPT
iptables -A INPUT -p tcp --dport <AGENTFLOW_PORT> -j DROP