CVE-2026-28286
📋 TL;DR
This vulnerability allows attackers to bypass frontend restrictions and create files or directories in sensitive system locations like /etc and /usr via direct API calls. It affects ZimaOS users running version 1.5.2-beta3 where the API lacks proper path validation. No authentication is required to exploit this flaw.
💻 Affected Systems
- ZimaOS
📦 What is this software?
Zimaos by Zimaspace
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary file creation in critical directories, enabling privilege escalation, backdoor installation, or system destruction.
Likely Case
Unauthorized file creation leading to configuration manipulation, service disruption, or data corruption in sensitive system areas.
If Mitigated
Limited impact if API access is restricted through network controls, though local attackers could still exploit the vulnerability.
🎯 Exploit Status
Exploitation requires crafting API requests to target sensitive paths, which is straightforward given the advisory details. No authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-65mg-9gw5-vr7g
Restart Required: No
Instructions:
No official patch is available. Monitor the vendor advisory for updates and apply any future patches immediately.
🔧 Temporary Workarounds
Restrict API Network Access
linuxBlock external and unnecessary internal access to the ZimaOS API endpoints using firewall rules.
iptables -A INPUT -p tcp --dport [API_PORT] -j DROP
ufw deny [API_PORT]
Disable or Remove Vulnerable Version
allReplace ZimaOS 1.5.2-beta3 with a non-vulnerable version or alternative OS if possible.
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks and implement strict network segmentation.
- Monitor API logs for suspicious file creation attempts in system directories and implement alerting.
🔍 How to Verify
Check if Vulnerable:
Check if running ZimaOS version 1.5.2-beta3 via system information or package manager. Test by attempting to create a file in /tmp via API and observing if restrictions apply.Check Version:
cat /etc/os-release | grep VERSION or check ZimaOS web interface for version informationVerify Fix Applied:
Once a patch is released, verify the fix by testing API requests to create files in restricted paths; they should be rejected with proper error messages.📡 Detection & Monitoring
Log Indicators:
- API logs showing file creation requests targeting /etc, /usr, or other system directories
- System logs showing unexpected file creations in protected paths
Network Indicators:
- Unusual API traffic patterns, especially POST requests to file creation endpoints with system path parameters
SIEM Query:
source="zimaos_api" AND (path="/etc" OR path="/usr" OR path CONTAINS "system") AND action="create"