CVE-2026-25877
📋 TL;DR
Chartbrew versions before 4.8.1 have an authorization bypass vulnerability where authenticated users can manipulate charts belonging to other projects. The application only checks project-level permissions but doesn't validate chart ownership, allowing cross-project data access. All Chartbrew instances running vulnerable versions are affected.
💻 Affected Systems
- Chartbrew
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Malicious authenticated user could delete, modify, or exfiltrate all charts across all projects, causing complete data loss and unauthorized access to sensitive business intelligence data.
Likely Case
Authenticated users accidentally or intentionally accessing charts from projects they shouldn't have access to, leading to data leakage and unauthorized modifications.
If Mitigated
With proper network segmentation and strict access controls, impact is limited to authorized users within their designated project boundaries.
🎯 Exploit Status
Exploitation requires authenticated access but is trivial once authenticated. Attackers can modify chart_id parameters in API requests to access unauthorized charts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.8.1
Vendor Advisory: https://github.com/chartbrew/chartbrew/security/advisories/GHSA-9fcr-x8x8-mrxc
Restart Required: Yes
Instructions:
1. Backup your Chartbrew instance and database. 2. Update to version 4.8.1 via git pull or package manager. 3. Run database migrations if required. 4. Restart the Chartbrew service.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Chartbrew instances and restrict access to trusted users only
API Rate Limiting
allImplement rate limiting on chart-related API endpoints to detect anomalous access patterns
🧯 If You Can't Patch
- Implement strict network access controls to limit Chartbrew access to authorized users only
- Enable detailed audit logging for all chart operations and monitor for unauthorized access patterns
🔍 How to Verify
Check if Vulnerable:
Check Chartbrew version via web interface or configuration files. Versions below 4.8.1 are vulnerable.Check Version:
Check package.json or docker-compose.yml for version, or visit /api/version endpoint if availableVerify Fix Applied:
After updating to 4.8.1, test that authenticated users cannot access charts from projects they don't belong to by attempting to modify chart_id parameters.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authorization attempts for chart operations
- User accessing charts from multiple different project IDs in short timeframes
- API requests with mismatched project_id and chart_id parameters
Network Indicators:
- Unusual patterns of chart-related API calls from single users
- High volume of PUT/DELETE requests to chart endpoints
SIEM Query:
source="chartbrew" AND (operation="update_chart" OR operation="delete_chart") | stats count by user_id, project_id | where count > threshold