CVE-2026-28193
📋 TL;DR
This vulnerability in JetBrains YouTrack allows applications to send unauthorized requests to the app permissions endpoint, potentially enabling privilege escalation or unauthorized access. It affects YouTrack instances running versions before 2025.3.121962. Organizations using vulnerable YouTrack versions for issue tracking and project management are at risk.
💻 Affected Systems
- JetBrains YouTrack
📦 What is this software?
Youtrack by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain administrative privileges, access sensitive project data, modify permissions, or compromise the entire YouTrack instance.
Likely Case
Unauthorized users could elevate their permissions, access restricted projects/issues, or manipulate workflow configurations.
If Mitigated
With proper network segmentation and access controls, impact would be limited to the YouTrack application itself.
🎯 Exploit Status
Requires some application access; exploitation details not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.3.121962 and later
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup YouTrack data and configuration. 2. Download YouTrack 2025.3.121962 or later from JetBrains. 3. Stop YouTrack service. 4. Install/upgrade to patched version. 5. Restart YouTrack service. 6. Verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to YouTrack to only trusted IP addresses/networks
Application Firewall Rules
allImplement WAF rules to block suspicious requests to permissions endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate YouTrack from untrusted networks
- Enable detailed audit logging and monitor for unusual permission modification attempts
🔍 How to Verify
Check if Vulnerable:
Check YouTrack version in Administration → System → About, or via REST API at /api/admin/versionCheck Version:
curl -s http://youtrack-server/api/admin/version | grep versionVerify Fix Applied:
Confirm version is 2025.3.121962 or higher and test permission endpoint access controls📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /api/admin/permissions endpoints
- Multiple failed permission modification attempts
- Unexpected user privilege changes
Network Indicators:
- Unusual traffic patterns to YouTrack admin endpoints
- Requests to permissions API from unexpected sources
SIEM Query:
source="youtrack" AND (uri_path="/api/admin/permissions" OR event_type="PERMISSION_MODIFY")