CVE-2026-25848
📋 TL;DR
This authentication bypass vulnerability in JetBrains Hub allows attackers to perform administrative actions without proper credentials. All organizations running vulnerable versions of JetBrains Hub are affected. The vulnerability enables unauthorized administrative access to the Hub platform.
💻 Affected Systems
- JetBrains Hub
📦 What is this software?
Hub by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the JetBrains Hub instance allowing attackers to create new admin accounts, modify user permissions, access sensitive data, and potentially pivot to connected systems.
Likely Case
Unauthorized administrative access leading to privilege escalation, user account manipulation, and potential data exfiltration from the Hub platform.
If Mitigated
Limited impact if strong network segmentation, monitoring, and access controls are in place to detect and prevent unauthorized administrative actions.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have low exploitation complexity once the bypass method is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.3.119807 or later
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup your Hub instance and configuration. 2. Download and install JetBrains Hub version 2025.3.119807 or later from the official JetBrains website. 3. Follow the JetBrains Hub upgrade documentation for your specific deployment method. 4. Restart the Hub service. 5. Verify the upgrade was successful.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to JetBrains Hub to only trusted IP addresses and networks
Enhanced Monitoring
allImplement strict monitoring for administrative actions and failed authentication attempts
🧯 If You Can't Patch
- Isolate the JetBrains Hub instance behind a firewall with strict IP-based access controls
- Implement multi-factor authentication and monitor all administrative actions for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check the Hub version in the administration interface or via the Hub API. If version is earlier than 2025.3.119807, the system is vulnerable.Check Version:
Check the Hub web interface under Administration → System Information, or use the Hub REST API endpoint /api/rest/application/infoVerify Fix Applied:
Verify the Hub version shows 2025.3.119807 or later in the administration interface and test that authentication bypass attempts fail.📡 Detection & Monitoring
Log Indicators:
- Unusual administrative actions from unexpected IP addresses
- Multiple failed authentication attempts followed by successful administrative actions
- Authentication bypass patterns in access logs
Network Indicators:
- Unusual administrative API calls from unauthenticated sources
- Authentication endpoint anomalies
SIEM Query:
source="hub-logs" AND (event_type="admin_action" AND user="anonymous" OR auth_result="bypass")