CVE-2026-7041: MiroFish Information Disclosure Vulnerability

CVE-2026-7041 Overview

A vulnerability has been identified in 666ghj MiroFish up to version 0.1.2. The vulnerability affects an unknown function within the /console endpoint of the Werkzeug Debugger PIN Handler component. By manipulating the SECRET argument, an attacker can trigger information disclosure. This vulnerability can be exploited remotely, though the attack is considered to have high complexity and the exploitability is regarded as difficult. A proof-of-concept exploit has been publicly disclosed.

Critical Impact

Remote attackers can potentially extract sensitive information through the Werkzeug Debugger PIN Handler by manipulating the SECRET parameter, leading to information disclosure that could facilitate further attacks against the application.

Affected Products

• 666ghj MiroFish versions up to 0.1.2
• Applications utilizing the vulnerable Werkzeug Debugger PIN Handler component
• Systems exposing the /console endpoint to untrusted networks

Discovery Timeline

• April 26, 2026 - CVE-2026-7041 published to NVD
• April 29, 2026 - Last updated in NVD database

Technical Details for CVE-2026-7041

Vulnerability Analysis

This vulnerability is classified as an Information Exposure issue (CWE-200) affecting the Werkzeug Debugger PIN Handler component in MiroFish. The Werkzeug debugger is a development tool commonly used with Python web frameworks like Flask. When improperly exposed in production environments, the debugger's /console endpoint can become an attack surface.

The vulnerability allows remote attackers to manipulate the SECRET argument to extract sensitive information. The Werkzeug debugger PIN is typically calculated based on system-specific values including machine ID, username, and application paths. By exploiting this vulnerability, attackers may be able to disclose information that could be used to bypass PIN protection or gain further access to the application.

The project maintainers were notified through a GitHub issue but have not yet responded to the report.

Root Cause

The root cause of this vulnerability lies in improper handling of the SECRET parameter within the Werkzeug Debugger PIN Handler. The application fails to adequately protect sensitive information when processing requests to the /console endpoint. This allows attackers to craft malicious requests that manipulate the SECRET argument and cause the application to disclose confidential data that should remain protected.

The exposure of the Werkzeug debugger console in a network-accessible manner compounds this issue, as the debugger is intended for local development use only.

Attack Vector

The attack is conducted remotely over the network by targeting the /console endpoint of the Werkzeug Debugger PIN Handler. An attacker must craft requests that manipulate the SECRET argument to trigger information disclosure. While the attack can be initiated remotely without authentication, the high complexity of the attack and the difficulty of exploitation provide some protection against casual attacks.

The vulnerability mechanism involves manipulating input parameters sent to the debugger console endpoint. When the SECRET argument is improperly handled, the application may leak sensitive information such as system identifiers, file paths, or configuration data that could be leveraged for subsequent attacks.

For technical details on the vulnerability, see the VulDB vulnerability details and the GitHub issue discussion.

Detection Methods for CVE-2026-7041

Indicators of Compromise

• Unusual HTTP requests targeting the /console endpoint with manipulated SECRET parameters
• Unexpected access patterns to Werkzeug debugger endpoints from external IP addresses
• Log entries showing repeated attempts to access the debugger console with varying parameter values
• Network traffic containing responses from the /console endpoint to external hosts

Detection Strategies

• Monitor web server access logs for requests to /console or Werkzeug debugger endpoints
• Implement web application firewall (WAF) rules to detect and block suspicious parameter manipulation attempts
• Deploy network intrusion detection signatures for Werkzeug debugger exploitation attempts
• Use endpoint detection to identify unauthorized access to development/debugging interfaces

Monitoring Recommendations

• Enable detailed logging for all requests to the /console endpoint and related debugger paths
• Configure alerts for any external network access to development or debugging endpoints
• Implement anomaly detection for unusual parameter values in requests to the Werkzeug debugger
• Regularly audit web server configurations to ensure debugging interfaces are not exposed

How to Mitigate CVE-2026-7041

Immediate Actions Required

• Disable the Werkzeug debugger in production environments immediately
• Block external network access to the /console endpoint using firewall rules
• Review application configurations to ensure debug mode is disabled in production
• Upgrade MiroFish to a patched version when available from the maintainers

Patch Information

At the time of publication, the project maintainers have been notified through a GitHub issue report but have not yet responded. Users should monitor the MiroFish GitHub repository for updates and security patches. Consider implementing the workarounds below until an official fix is released.

Workarounds

• Ensure the Werkzeug debugger is completely disabled in production by setting debug=False in application configuration
• Use network-level controls to restrict access to the /console endpoint to localhost only
• Implement application-level authentication for any debugging interfaces that must remain accessible
• Deploy the application behind a reverse proxy configured to block requests to /console endpoints

# Configuration example - Nginx rule to block Werkzeug debugger access
location /console {
    deny all;
    return 403;
}

# Flask application configuration to disable debugger
# In your Flask app configuration file:
# DEBUG = False
# WERKZEUG_DEBUG_PIN = 'off'