CVE-2026-1616
📋 TL;DR
This vulnerability in Open Security Issue Management (OSIM) allows attackers to perform path traversal attacks by manipulating query parameters in nginx configuration. It affects OSIM versions prior to v2025.9.0, potentially exposing sensitive files on the server.
💻 Affected Systems
- Open Security Issue Management (OSIM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through arbitrary file read/write, leading to data exfiltration, credential theft, or remote code execution.
Likely Case
Unauthorized access to sensitive configuration files, logs, or application data stored on the server filesystem.
If Mitigated
Limited impact with proper file permissions and web server hardening, though some information disclosure may still occur.
🎯 Exploit Status
Exploitation requires sending specially crafted HTTP requests with path traversal sequences in query parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2025.9.0
Vendor Advisory: https://github.com/RedHatProductSecurity/osim/pull/615
Restart Required: Yes
Instructions:
1. Upgrade OSIM to version v2025.9.0 or later. 2. Update nginx configuration files to remove vulnerable $uri$args concatenation. 3. Restart nginx service.
🔧 Temporary Workarounds
Modify nginx configuration
linuxRemove or secure the $uri$args concatenation in nginx configuration to prevent path traversal via query parameters.
# Edit nginx config file (e.g., /etc/nginx/nginx.conf)
# Find lines containing $uri$args and replace with secure alternatives
# Reload nginx: sudo nginx -s reload
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all query parameters.
- Apply network segmentation and restrict access to OSIM instances from untrusted networks.
🔍 How to Verify
Check if Vulnerable:
Check nginx configuration files for $uri$args concatenation patterns and verify OSIM version is below v2025.9.0.Check Version:
Check OSIM documentation or package manager for version information specific to your installation method.Verify Fix Applied:
Confirm OSIM version is v2025.9.0 or later and nginx configuration no longer contains vulnerable $uri$args concatenation.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests containing path traversal sequences (../, ..\) in query parameters
- Access attempts to sensitive files outside web root
Network Indicators:
- HTTP requests with encoded path traversal characters in query strings
- Unexpected file access patterns from web clients
SIEM Query:
web.url_query CONTAINS "..%2F" OR web.url_query CONTAINS "%2e%2e%2f" OR web.url_query CONTAINS "..\"