CVE-2026-25768
📋 TL;DR
CVE-2026-25768 is an authorization bypass vulnerability in LavinMQ message queue server where authenticated users can access broker metadata they shouldn't have permission to view. This affects all LavinMQ deployments with versions before 2.6.6. The vulnerability requires authenticated access but could expose sensitive configuration or operational data.
💻 Affected Systems
- LavinMQ
📦 What is this software?
Lavinmq by 84codes
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could access sensitive broker metadata including configuration details, queue statistics, or connection information that could facilitate further attacks or data exfiltration.
Likely Case
Authorized users exceeding their intended permissions to view metadata about queues, exchanges, or connections they shouldn't have access to, potentially exposing operational data.
If Mitigated
Limited exposure of non-critical metadata with proper network segmentation and minimal user permissions.
🎯 Exploit Status
Exploitation requires authenticated access to the LavinMQ management interface or API.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.6.6
Vendor Advisory: https://github.com/cloudamqp/lavinmq/security/advisories/GHSA-r2mh-8vq6-qf7m
Restart Required: No
Instructions:
1. Backup your current configuration and data. 2. Stop LavinMQ service. 3. Update to version 2.6.6 or later using your package manager or by downloading from GitHub releases. 4. Start LavinMQ service. 5. Verify the version is 2.6.6 or higher.
🔧 Temporary Workarounds
Restrict User Permissions
allMinimize user permissions to only what's absolutely necessary for their role
Network Segmentation
allRestrict access to LavinMQ management interface to trusted networks only
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the LavinMQ management interface
- Audit and minimize user accounts with access to LavinMQ, ensuring least privilege principles
🔍 How to Verify
Check if Vulnerable:
Check if LavinMQ version is below 2.6.6 using the version check commandCheck Version:
lavinmqctl status | grep versionVerify Fix Applied:
Confirm version is 2.6.6 or higher and test that authenticated users cannot access unauthorized metadata📡 Detection & Monitoring
Log Indicators:
- Unauthorized metadata access attempts in LavinMQ logs
- Unusual patterns of metadata queries from authenticated users
Network Indicators:
- Unusual volume of metadata requests to LavinMQ management API
SIEM Query:
source="lavinmq.log" AND ("metadata" OR "unauthorized" OR "permission denied")