CVE-2024-5386: Lunary Auth Bypass Vulnerability

CVE-2024-5386 Overview

CVE-2024-5386 is a critical account hijacking vulnerability in lunary-ai/lunary version 1.2.2 caused by improper handling of password reset tokens. The flaw enables users with the low-privileged 'viewer' role to obtain password reset tokens belonging to other users, effectively allowing unauthorized account takeover through privilege escalation.

Critical Impact

This vulnerability allows low-privileged users to hijack any account in the system by exploiting leaked password reset tokens, leading to complete account compromise and potential data exfiltration.

Affected Products

• lunary-ai/lunary version 1.2.2
• Earlier versions of lunary-ai/lunary may also be affected

Discovery Timeline

• 2026-02-02 - CVE-2024-5386 published to NVD
• 2026-02-03 - Last updated in NVD database

Technical Details for CVE-2024-5386

Vulnerability Analysis

This vulnerability stems from excessive attack surface exposure in the lunary-ai/lunary application's password recovery functionality. When a user with the 'viewer' role sends a crafted request to the server, the application improperly responds with a password reset token in the recoveryToken parameter. This token exposure allows the attacker to reset the password of any user account without proper authorization checks.

The root issue is classified under CWE-1125 (Excessive Attack Surface), indicating that the application exposes functionality that should be restricted to higher-privileged roles or system processes only. The password reset mechanism lacks proper authorization controls to verify that the requesting user has legitimate access to the recovery token.

Root Cause

The vulnerability exists due to insufficient access control validation in the password reset token generation and retrieval process. The application fails to properly restrict access to the recoveryToken parameter based on user roles, allowing 'viewer' role users to access sensitive authentication tokens that should only be available to account owners or administrators.

The excessive attack surface exposed by the application allows lower-privileged users to invoke functionality intended for password recovery operations, which should be protected by strict authorization checks.

Attack Vector

The attack is network-based and requires the attacker to have low-level privileges (viewer role) within the lunary application. The exploitation process involves:

1. An attacker authenticates with a low-privileged 'viewer' account
2. The attacker sends a specially crafted request to the password reset endpoint
3. The server responds with a recoveryToken for the targeted user account
4. The attacker uses this token to reset the target user's password
5. The attacker gains full access to the hijacked account

The vulnerability does not require user interaction and can be exploited with minimal complexity. Since the attack can affect resources beyond the vulnerable component's scope, it has significant impact on confidentiality and integrity.

For detailed technical information about the vulnerability and the fix, refer to the GitHub Commit Details and the Huntr Bug Bounty Listing.

Detection Methods for CVE-2024-5386

Indicators of Compromise

• Unusual password reset token requests originating from low-privileged user sessions
• Multiple password reset activities targeting different accounts from a single source
• Unauthorized access to accounts following password reset token generation events
• Anomalous API requests to password recovery endpoints from viewer-role accounts

Detection Strategies

• Monitor API requests to password reset endpoints and flag requests from users with viewer-role privileges
• Implement logging for all recoveryToken parameter access and correlate with user privilege levels
• Create alerts for password reset events where the requesting user differs from the account owner
• Deploy behavioral analysis to detect privilege escalation patterns in authentication workflows

Monitoring Recommendations

• Enable detailed audit logging for all authentication and password management operations
• Configure real-time alerting for suspicious password reset token generation activities
• Establish baseline patterns for normal password recovery usage and alert on deviations
• Review access logs regularly for viewer-role users accessing administrative or sensitive endpoints

How to Mitigate CVE-2024-5386

Immediate Actions Required

• Upgrade lunary-ai/lunary to a patched version that addresses this vulnerability
• Review user accounts for signs of unauthorized access or password changes
• Audit viewer-role user activities for potential exploitation attempts
• Implement additional authorization checks on password reset functionality

Patch Information

A security fix has been released by lunary-ai. The patch is available at commit fc7ab3d5621c18992da5dab3a2a9a8d227d42311. Organizations should update to the patched version immediately to prevent exploitation.

For patch details, see the GitHub Commit.

Workarounds

• Restrict API access to password reset endpoints at the network level until patching is complete
• Implement additional role-based access control checks at the application gateway
• Temporarily disable or revoke viewer-role permissions for users who do not require them
• Enable multi-factor authentication to add an additional layer of protection against account takeover

# Example: Restrict access to password reset endpoints via nginx
location /api/password-reset {
    # Allow only from trusted admin networks
    allow 10.0.0.0/8;
    deny all;
}