CVE-2026-1588: jshERP Path Traversal Vulnerability

CVE-2026-1588 Overview

A path traversal vulnerability has been identified in jishenghua jshERP up to version 3.6. The vulnerability exists within the install function of the /jshERP-boot/plugin/installByPath endpoint, specifically in the com.gitee.starblues.integration.operator.DefaultPluginOperator component. Through manipulation of the path argument, an attacker can traverse the file system to access files and directories outside of the intended scope.

Critical Impact

Remote attackers with high privileges can exploit this path traversal vulnerability to access sensitive files on the system, potentially exposing confidential configuration data, credentials, or other sensitive information stored on the server.

Affected Products

• jishenghua jshERP versions up to and including 3.6
• jshERP-boot plugin installation component
• Systems running com.gitee.starblues.integration.operator.DefaultPluginOperator

Discovery Timeline

• 2026-01-29 - CVE-2026-1588 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2026-1588

Vulnerability Analysis

This vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as path traversal. The vulnerable component resides in the plugin installation functionality of jshERP, an enterprise resource planning application. The install function within DefaultPluginOperator fails to properly validate and sanitize the path argument before using it in file system operations.

When processing plugin installation requests, the application constructs file paths using user-supplied input without adequate validation. This allows an attacker to include directory traversal sequences (such as ../) in the path parameter, enabling navigation outside the intended plugin directory structure.

The vulnerability can be exploited remotely over the network, though it requires high-level privileges to access the plugin installation functionality. The exploit technique has been publicly disclosed and documented in the project's issue tracker, increasing the risk of exploitation.

Root Cause

The root cause stems from insufficient input validation in the DefaultPluginOperator class. The path argument received by the install function is not properly sanitized to remove or reject directory traversal sequences. The application fails to implement proper path canonicalization or validate that the resolved path remains within the expected plugin installation directory, allowing attackers to break out of the intended directory structure.

Attack Vector

The attack is executed remotely over the network by sending a crafted HTTP request to the /jshERP-boot/plugin/installByPath endpoint. The attacker manipulates the path parameter to include traversal sequences that navigate outside the intended directory.

The vulnerable endpoint processes the malicious path without proper validation, allowing the attacker to reference files or directories outside of the intended plugin installation path. While the attacker requires high privileges to access this functionality, successful exploitation could lead to unauthorized read access to sensitive system files.

For detailed technical information about this vulnerability and the proof of concept, refer to the GitHub Issue Tracker.

Detection Methods for CVE-2026-1588

Indicators of Compromise

• HTTP requests to /jshERP-boot/plugin/installByPath containing path traversal sequences such as ../ or encoded variants (%2e%2e%2f)
• Unusual file access attempts originating from the jshERP application process targeting directories outside the plugin folder
• Access logs showing requests with abnormally long or suspicious path parameter values
• Failed or successful attempts to read sensitive configuration files or system files through the plugin installation endpoint

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns in requests to the /jshERP-boot/plugin/installByPath endpoint
• Monitor application logs for requests containing ../, ..\\, or URL-encoded directory traversal sequences in the path parameter
• Configure intrusion detection systems (IDS) to alert on file access attempts outside the jshERP application directory
• Enable audit logging on sensitive files and directories to detect unauthorized access attempts

Monitoring Recommendations

• Establish baseline behavior for the plugin installation endpoint and alert on anomalous activity patterns
• Review access logs regularly for requests to the vulnerable endpoint from unexpected source IPs
• Monitor system file integrity to detect any unauthorized file reads or modifications
• Implement security information and event management (SIEM) rules to correlate path traversal attempt indicators across multiple log sources

How to Mitigate CVE-2026-1588

Immediate Actions Required

• Restrict access to the /jshERP-boot/plugin/installByPath endpoint to only trusted administrators until a patch is available
• Implement network-level access controls to limit which IP addresses can reach the vulnerable endpoint
• Deploy WAF rules to block requests containing path traversal sequences targeting jshERP endpoints
• Review and audit existing plugin installations for any signs of exploitation

Patch Information

As of the last update, the jshERP project maintainers have not responded to the vulnerability disclosure. No official patch is currently available. Monitor the jshERP GitHub Repository for security updates and patch releases. Additional vulnerability details are available through VulDB #343351.

Workarounds

• Disable or remove the plugin installation functionality if not actively required for business operations
• Implement application-level input validation to sanitize the path parameter and reject any directory traversal sequences
• Use a reverse proxy to filter and validate incoming requests before they reach the jshERP application
• Consider deploying the application in a containerized environment with limited file system access to reduce the impact of successful exploitation

# Example: Block access to vulnerable endpoint using Apache mod_rewrite
# Add to Apache configuration or .htaccess
<Location "/jshERP-boot/plugin/installByPath">
    Order deny,allow
    Deny from all
    # Allow only trusted admin IPs
    Allow from 192.168.1.100
    Allow from 10.0.0.0/8
</Location>