CVE-2026-5014: elecV2P Path Traversal Vulnerability

CVE-2026-5014 Overview

A path traversal vulnerability has been discovered in elecV2 elecV2P up to version 3.8.3. The vulnerability exists in the path.join function within the /log/ file of the Wildcard Handler component. This flaw allows remote attackers to manipulate file paths and potentially access files outside of the intended directory structure.

Critical Impact

Remote attackers can exploit this path traversal vulnerability to read arbitrary files on the server, potentially exposing sensitive configuration data, credentials, or other confidential information stored on the affected system.

Affected Products

• elecV2 elecV2P versions up to and including 3.8.3
• Systems running elecV2P with exposed /log/ endpoints
• Deployments with network-accessible Wildcard Handler components

Discovery Timeline

• 2026-03-28 - CVE-2026-5014 published to NVD
• 2026-03-30 - Last updated in NVD database

Technical Details for CVE-2026-5014

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 flaw resides in the Wildcard Handler component of elecV2P, specifically in how the application processes file path inputs through the path.join function.

The vulnerability allows unauthenticated remote attackers to craft malicious requests that escape the intended /log/ directory by using path traversal sequences. When the application fails to properly sanitize user-supplied input before passing it to path.join, attackers can navigate the file system hierarchy and access files outside the designated log directory.

The exploit has been publicly disclosed through GitHub Issue #200 and documented in VulDB. According to the disclosure report, the project maintainers were notified but had not responded at the time of publication.

Root Cause

The root cause of this vulnerability stems from improper input validation in the Wildcard Handler component. The path.join function is used to construct file paths from user-controlled input without adequate sanitization. While path.join normalizes path segments, it does not prevent path traversal when malicious sequences like ../ are included in the input. The application fails to verify that the resulting resolved path remains within the intended /log/ directory boundary, enabling attackers to escape the restricted directory and access arbitrary files on the system.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can send specially crafted HTTP requests to the vulnerable /log/ endpoint containing path traversal sequences. These sequences allow the attacker to navigate up the directory tree and access sensitive files such as /etc/passwd, application configuration files, or other system files that the web application has read permissions for.

The attack exploits the Wildcard Handler's failure to properly validate and constrain file path resolution. By including directory traversal patterns in requests to the /log/ endpoint, an attacker can reference files anywhere on the file system that the application process has access to read.

Detection Methods for CVE-2026-5014

Indicators of Compromise

• HTTP requests to /log/ endpoints containing ../ or encoded variants (%2e%2e%2f, %252e%252e%252f)
• Access log entries showing attempts to retrieve files outside the log directory
• Unusual file access patterns in application logs indicating traversal attempts
• Network traffic containing path traversal sequences targeting elecV2P instances

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block path traversal patterns in URL paths and parameters
• Implement application-level logging to capture all file access requests and flag any that resolve outside expected directories
• Monitor HTTP request logs for suspicious patterns including encoded traversal sequences and requests for sensitive system files
• Configure intrusion detection systems (IDS) with signatures for common path traversal attack patterns

Monitoring Recommendations

• Enable verbose logging on elecV2P instances to capture detailed request information
• Set up alerts for any HTTP 200 responses to requests containing traversal sequences
• Monitor file system access logs for reads of sensitive files by the elecV2P process
• Regularly audit access logs for patterns consistent with reconnaissance or exploitation attempts

How to Mitigate CVE-2026-5014

Immediate Actions Required

• Restrict network access to elecV2P instances to trusted networks or IP addresses only
• Implement reverse proxy rules to block requests containing path traversal sequences before they reach the application
• Disable or restrict access to the /log/ endpoint if not required for business operations
• Review file system permissions to ensure the elecV2P process has minimal read access

Patch Information

As of the last NVD update on 2026-03-30, the elecV2P project maintainers had not responded to the vulnerability disclosure. Organizations should monitor the elecV2P GitHub repository for security updates and patches. In the absence of an official fix, implementing the workarounds below is strongly recommended.

Workarounds

• Deploy a reverse proxy or WAF in front of elecV2P with rules to reject requests containing ../, ..%2f, %2e%2e/, or other encoded traversal patterns
• Use network segmentation to isolate elecV2P instances from untrusted networks
• Implement file system permissions to restrict the application's read access to only necessary directories
• Consider running elecV2P in a containerized environment with limited file system access

# Example nginx configuration to block path traversal attempts
location /log/ {
    # Block requests containing path traversal patterns
    if ($request_uri ~* "\.\.") {
        return 403;
    }
    
    # Block encoded traversal attempts
    if ($request_uri ~* "%2e%2e") {
        return 403;
    }
    
    proxy_pass http://elecv2p_backend;
}