CVE-2026-28676
📋 TL;DR
OpenSift versions before 1.6.3-alpha contain a path traversal vulnerability (CWE-22) in multiple storage helpers that don't properly enforce directory containment. This allows attackers to read, write, or delete arbitrary files on the system if they can inject malicious path values. All users running vulnerable versions are affected.
💻 Affected Systems
- OpenSift
⚠️ 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
Complete system compromise via arbitrary file write leading to remote code execution, data exfiltration, or system destruction.
Likely Case
Unauthorized file access leading to sensitive data exposure, configuration tampering, or denial of service through file deletion.
If Mitigated
Limited impact with proper input validation and file system permissions restricting access to sensitive areas.
🎯 Exploit Status
Path traversal vulnerabilities are typically easy to exploit once the injection point is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.3-alpha
Vendor Advisory: https://github.com/OpenSift/OpenSift/security/advisories/GHSA-ww4m-c7hv-2rqv
Restart Required: Yes
Instructions:
1. Backup your OpenSift configuration and data. 2. Stop OpenSift service. 3. Update to version 1.6.3-alpha using your package manager or by downloading from GitHub releases. 4. Restart OpenSift service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject path traversal sequences like '../' in file operations.
# Add input validation in your application code before file operations
# Example Python: if '..' in user_input: raise ValueError('Invalid path')
File System Permissions Restriction
linuxRun OpenSift with minimal file system permissions and use chroot/jail to limit accessible directories.
# Run as non-root user
sudo -u opensift_user opensift
# Use chroot if supported
chroot /var/opensift/jail opensift
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all file path inputs
- Apply principle of least privilege by running OpenSift with restricted file system permissions
🔍 How to Verify
Check if Vulnerable:
Check if OpenSift version is earlier than 1.6.3-alpha using the version command or configuration file.Check Version:
opensift --versionVerify Fix Applied:
Confirm version is 1.6.3-alpha or later and test file operations with malicious path inputs to ensure they're rejected.📡 Detection & Monitoring
Log Indicators:
- Failed file access attempts with path traversal sequences (../)
- Unexpected file operations outside expected directories
- Permission denied errors for system files
Network Indicators:
- Unusual file upload/download patterns
- Requests containing path traversal sequences in parameters
SIEM Query:
source="opensift.log" AND ("..\/" OR "%2e%2e%2f" OR "..\\" OR path_traversal)🔗 References
- https://github.com/OpenSift/OpenSift/commit/1126e0a503876056a68a434e19f64158a5a4840b
- https://github.com/OpenSift/OpenSift/commit/de99b9c
- https://github.com/OpenSift/OpenSift/pull/67
- https://github.com/OpenSift/OpenSift/releases/tag/v1.6.3-alpha
- https://github.com/OpenSift/OpenSift/security/advisories/GHSA-ww4m-c7hv-2rqv
