CVE-2026-23846
📋 TL;DR
CVE-2026-23846 is a sensitive information exposure vulnerability in Tugtainer where passwords are transmitted via URL query parameters instead of secure HTTP request bodies. This exposes passwords in server logs, browser history, Referer headers, and proxy logs. All users running Tugtainer versions before 1.16.1 are affected.
💻 Affected Systems
- Tugtainer
📦 What is this software?
Tugtainer by Quenary
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Tugtainer, allowing them to modify Docker container configurations, deploy malicious containers, or access sensitive infrastructure.
Likely Case
Credential harvesting leading to unauthorized access to Tugtainer's management interface and potential container manipulation.
If Mitigated
Limited exposure if logs are properly secured and access is restricted, but credentials remain vulnerable in transit.
🎯 Exploit Status
Exploitation requires access to logs or ability to intercept traffic, but the vulnerability itself is simple to understand and leverage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.16.1
Vendor Advisory: https://github.com/Quenary/tugtainer/security/advisories/GHSA-f2qf-f544-xm4p
Restart Required: Yes
Instructions:
1. Stop Tugtainer service. 2. Update to version 1.16.1 via package manager or manual installation. 3. Restart Tugtainer service. 4. Verify the fix by checking version and testing authentication.
🔧 Temporary Workarounds
Disable password authentication
allUse alternative authentication methods like API keys or disable authentication if in trusted environment
Modify Tugtainer configuration to use API key authentication or disable auth entirely
Secure log storage
linuxRestrict access to server logs and implement log encryption
chmod 600 /var/log/tugtainer/*
Implement log encryption via syslog-ng or rsyslog
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Tugtainer management interface
- Rotate all Tugtainer passwords immediately and monitor for unauthorized access
🔍 How to Verify
Check if Vulnerable:
Check Tugtainer version: if version < 1.16.1, it's vulnerable. Also inspect authentication requests for passwords in URL parameters.Check Version:
docker exec tugtainer tugtainer --version or check container image tagVerify Fix Applied:
After updating to 1.16.1, verify that authentication requests no longer include passwords in URL query strings and only use POST body.📡 Detection & Monitoring
Log Indicators:
- URLs containing 'password=' parameter in access logs
- Authentication attempts with passwords visible in query strings
Network Indicators:
- HTTP GET requests with password parameters
- Referer headers containing credentials
SIEM Query:
source="tugtainer" AND (url="*password=*" OR referer="*password=*")