CVE-2026-30823: Flowiseai Flowise Auth Bypass Vulnerability

CVE-2026-30823 Overview

CVE-2026-30823 is a high-severity Insecure Direct Object Reference (IDOR) vulnerability affecting Flowise, a popular drag-and-drop user interface platform designed for building customized large language model (LLM) workflows. This vulnerability exists in versions prior to 3.0.13 and enables attackers to perform account takeover attacks and bypass enterprise-grade Single Sign-On (SSO) configurations.

Flowise has gained significant adoption within organizations deploying AI and LLM-based solutions, making this vulnerability particularly concerning for enterprises that rely on SSO integrations for secure authentication. The IDOR flaw allows authenticated attackers with low privileges to manipulate object references and access resources belonging to other users, potentially compromising the entire LLM workflow infrastructure.

Critical Impact

Authenticated attackers can exploit this IDOR vulnerability to take over user accounts and bypass enterprise SSO configurations, potentially gaining unauthorized access to sensitive LLM workflows and data.

Affected Products

• Flowise versions prior to 3.0.13
• FlowiseAI Flowise (all installations running vulnerable versions)
• Enterprise deployments using SSO authentication

Discovery Timeline

• 2026-03-07 - CVE CVE-2026-30823 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-30823

Vulnerability Analysis

This vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key), which describes security weaknesses where an application uses user-controlled input to determine which objects or resources to access without proper authorization checks.

In the context of Flowise, the application fails to properly validate whether the authenticated user has permission to access or modify the requested resources. When users interact with account-related functionality or SSO configuration endpoints, the application relies on user-supplied identifiers without verifying ownership or authorization. This architectural flaw allows attackers to enumerate and access resources belonging to other users by manipulating these identifiers.

The network-based attack vector requires only low-level authentication, meaning any user with basic access to the Flowise platform can potentially escalate their privileges to take over other accounts or manipulate enterprise SSO settings. This represents a significant threat to multi-tenant deployments where user isolation is critical.

Root Cause

The root cause of CVE-2026-30823 lies in insufficient authorization validation within Flowise's resource access logic. The application fails to implement proper ownership checks when processing requests that reference user accounts or SSO configuration objects. Instead of verifying that the authenticated user has the appropriate permissions to access or modify the referenced resource, the application processes the request based solely on the provided object identifier.

This type of vulnerability commonly occurs when developers assume that obscuring or randomizing object identifiers provides sufficient security, neglecting to implement server-side authorization checks that validate user permissions for each resource access attempt.

Attack Vector

The attack is conducted over the network and requires the attacker to have low-privilege authenticated access to the Flowise platform. The exploitation flow typically involves:

1. The attacker authenticates to Flowise with a standard user account
2. The attacker identifies API endpoints or form submissions that reference user accounts or SSO configurations via object identifiers
3. By enumerating or predicting valid object identifiers, the attacker modifies requests to reference resources belonging to other users
4. Due to missing authorization checks, the application processes these requests, granting the attacker unauthorized access to victim accounts or SSO configurations
5. The attacker can then take over accounts, modify SSO settings to bypass authentication controls, or exfiltrate sensitive LLM workflow data

The vulnerability requires no user interaction from victims, and the attack can be automated to compromise multiple accounts rapidly.

Detection Methods for CVE-2026-30823

Indicators of Compromise

• Unusual access patterns to user account endpoints from a single authenticated session accessing multiple user objects
• Anomalous modifications to SSO configuration settings by non-administrative users
• Audit log entries showing sequential or enumerated access to user or configuration resources
• Failed and successful authentication attempts from accounts whose SSO configurations were recently modified

Detection Strategies

• Implement monitoring for API requests that access resources belonging to users other than the authenticated requester
• Deploy web application firewall (WAF) rules to detect parameter manipulation patterns associated with IDOR attacks
• Enable detailed access logging for all account and SSO configuration endpoints to create an audit trail
• Utilize behavior analytics to identify authenticated users accessing abnormal quantities of other users' resources

Monitoring Recommendations

• Review Flowise access logs for patterns of sequential user ID or configuration ID access from single sessions
• Monitor SSO configuration changes and correlate with legitimate administrative actions
• Set up alerts for account modifications that occur outside normal business processes
• Implement anomaly detection for API endpoints handling sensitive user data

How to Mitigate CVE-2026-30823

Immediate Actions Required

• Upgrade all Flowise installations to version 3.0.13 or later immediately
• Audit access logs for evidence of IDOR exploitation attempts prior to patching
• Review all SSO configurations to ensure they have not been tampered with
• Force password resets for users if account compromise is suspected
• Restrict network access to Flowise instances until patching is complete

Patch Information

FlowiseAI has addressed this vulnerability in version 3.0.13. Organizations should upgrade to this version or later to remediate the IDOR vulnerability. The patch implements proper authorization checks to ensure users can only access and modify resources they own or have explicit permission to manage.

For detailed patch information and release notes, refer to the Flowise 3.0.13 Release.

Additional security guidance is available in the GitHub Security Advisory GHSA-cwc3-p92j-g7qm.

Workarounds

• Restrict network access to Flowise instances to trusted IP ranges only until the patch can be applied
• Implement additional authentication layers such as VPN or reverse proxy access controls
• Disable SSO configuration modification capabilities for non-administrative users at the infrastructure level
• Deploy a web application firewall with rules to detect and block IDOR attack patterns
• Monitor all API access closely and immediately investigate anomalous patterns