CVE-2026-7059: MiroFish Path Traversal Vulnerability

CVE-2026-7059 Overview

A path traversal vulnerability has been identified in 666ghj MiroFish versions up to 0.1.2. This security flaw affects the get_simulation_posts function within the file backend/app/api/simulation.py of the Query Parameter Handler component. By manipulating the Platform argument, an attacker can perform path traversal attacks to access files outside of the intended directory structure. This vulnerability can be exploited remotely over the network without requiring authentication.

Critical Impact

Remote attackers can exploit this path traversal vulnerability to read sensitive files from the server by manipulating the Platform query parameter, potentially leading to information disclosure and unauthorized access to confidential data.

Affected Products

• 666ghj MiroFish versions up to 0.1.2
• Query Parameter Handler component in backend/app/api/simulation.py
• Applications utilizing the get_simulation_posts function

Discovery Timeline

• 2026-04-26 - CVE-2026-7059 published to NVD
• 2026-04-27 - Last updated in NVD database

Technical Details for CVE-2026-7059

Vulnerability Analysis

This vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as path traversal or directory traversal. The vulnerability exists in the get_simulation_posts function located in backend/app/api/simulation.py. The function fails to properly sanitize or validate the Platform query parameter before using it in file system operations.

When user-supplied input containing path traversal sequences (such as ../) is passed to the Platform parameter, the application does not adequately restrict the resulting path, allowing attackers to escape the intended directory and access arbitrary files on the server's file system. The exploit has been publicly disclosed, increasing the risk of active exploitation.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization of the Platform argument in the Query Parameter Handler. The get_simulation_posts function does not properly validate that the supplied platform value stays within the expected directory boundaries. Without proper path canonicalization and validation, malicious input containing directory traversal sequences can be used to construct file paths that point outside the application's intended data directory.

Attack Vector

The attack can be initiated remotely over the network without requiring any user interaction or authentication. An attacker can craft a malicious HTTP request to the affected endpoint, manipulating the Platform query parameter with path traversal sequences to read arbitrary files from the server.

The vulnerability allows attackers to traverse directories by injecting sequences like ../ into the Platform parameter. When the application processes this manipulated input, it constructs a file path that escapes the intended directory structure. For example, an attacker could potentially access sensitive configuration files, application source code, or system files by traversing up the directory tree and then navigating to the target file location.

For technical details and proof-of-concept information, refer to the GitHub Issue Discussion and VulDB entry.

Detection Methods for CVE-2026-7059

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..\, ..%2f, ..%5c) in the Platform query parameter
• Unusual access patterns to the /api/simulation endpoint with encoded directory traversal characters
• Server logs showing requests attempting to access files outside the expected simulation data directory
• Error messages or responses containing contents of system files or configuration files

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing common path traversal patterns in query parameters
• Monitor application logs for requests to the simulation API endpoint with suspicious Platform parameter values
• Deploy intrusion detection system (IDS) signatures specifically targeting directory traversal attempts in URL parameters
• Enable detailed access logging for the backend/app/api/simulation.py module to track file access patterns

Monitoring Recommendations

• Configure alerting for any HTTP requests containing encoded or unencoded path traversal sequences targeting the MiroFish application
• Monitor file system access logs for unexpected read operations on sensitive files or directories outside the application's data folder
• Implement log correlation to identify patterns of reconnaissance activity followed by exploitation attempts
• Review access logs regularly for requests to the simulation endpoint with anomalous Platform parameter values

How to Mitigate CVE-2026-7059

Immediate Actions Required

• Update 666ghj MiroFish to a patched version when available, or versions newer than 0.1.2 if a fix has been released
• Implement input validation to reject any Platform parameter values containing path traversal sequences
• Deploy web application firewall rules to block requests with directory traversal patterns
• Consider temporarily disabling the affected simulation endpoint if it is not critical to operations

Patch Information

At the time of this publication, users should monitor the MiroFish GitHub repository for security updates and patches addressing this vulnerability. Review the GitHub Issue #489 for the latest information on remediation status and any available patches.

Workarounds

• Implement server-side input validation to sanitize the Platform parameter by removing or rejecting path traversal sequences (../, ..\, and URL-encoded variants)
• Use path canonicalization functions to resolve the final path and verify it remains within the expected directory before processing
• Apply the principle of least privilege by restricting the web application's file system permissions to only the directories it needs to access
• Configure a reverse proxy or WAF in front of the application to filter malicious requests before they reach the vulnerable endpoint

The following example demonstrates implementing path validation in Python to prevent directory traversal:

# Path validation configuration for simulation.py
import os

def validate_platform_path(platform, base_dir):
    # Construct the full path
    requested_path = os.path.join(base_dir, platform)
    
    # Resolve to absolute path and check it's within base_dir
    abs_base = os.path.abspath(base_dir)
    abs_requested = os.path.abspath(requested_path)
    
    if not abs_requested.startswith(abs_base):
        raise ValueError("Invalid platform path - access denied")
    
    return abs_requested