CVE-2026-1896
📋 TL;DR
This vulnerability in WeKan allows attackers to bypass access controls during board migration operations by manipulating the boardId argument. Attackers can exploit this remotely to potentially access or modify boards they shouldn't have permission to. All WeKan instances up to version 8.20 are affected.
💻 Affected Systems
- WeKan
⚠️ 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
Attackers could migrate, modify, or delete boards belonging to other users, potentially causing data loss or unauthorized access to sensitive information.
Likely Case
Unauthorized access to boards, allowing attackers to view or modify content they shouldn't have access to.
If Mitigated
With proper network segmentation and access controls, impact would be limited to the WeKan application scope only.
🎯 Exploit Status
Exploitation requires understanding of WeKan's migration API and board structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.21
Vendor Advisory: https://github.com/wekan/wekan/releases/tag/v8.21
Restart Required: Yes
Instructions:
1. Backup your WeKan data and configuration. 2. Stop the WeKan service. 3. Update to WeKan version 8.21 or later. 4. Restart the WeKan service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable Migration API
allTemporarily disable the migration functionality if not required
Modify WeKan configuration to disable migration endpoints
Network Access Restriction
allRestrict access to WeKan migration endpoints
Configure firewall rules to block external access to /api/migration/* endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WeKan from untrusted networks
- Enable detailed logging and monitoring for migration-related activities
🔍 How to Verify
Check if Vulnerable:
Check WeKan version via admin interface or by examining the running container/processCheck Version:
docker inspect wekan/wekan | grep WEKAN_VERSION or check WeKan admin dashboardVerify Fix Applied:
Verify version is 8.21 or later and test migration functionality with proper access controls📡 Detection & Monitoring
Log Indicators:
- Unauthorized migration attempts
- Failed access control checks in migration logs
- Unexpected board migration activities
Network Indicators:
- Unusual requests to /api/migration/comprehensiveBoardMigration endpoint
- Multiple migration attempts from single source
SIEM Query:
source="wekan" AND (migration OR boardMigration) AND (status="failed" OR status="unauthorized")