CVE-2026-2205
📋 TL;DR
This vulnerability in WeKan allows remote attackers to access sensitive information through the Meteor Publication Handler in the cards.js component. It affects all WeKan instances up to version 8.20. Attackers can exploit this without authentication to potentially view confidential card data.
💻 Affected Systems
- WeKan
📦 What is this software?
Wekan by Wekan Project
⚠️ Risk & Real-World Impact
Worst Case
Complete exposure of all card data including sensitive business information, user details, and potentially authentication tokens.
Likely Case
Unauthorized access to card contents, board metadata, and user information leading to data leakage.
If Mitigated
Limited or no data exposure if proper network segmentation and access controls are implemented.
🎯 Exploit Status
Remote exploitation without authentication suggests relatively simple attack vectors.
🛠️ 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 using your package manager or deployment method. 4. Restart the WeKan service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to WeKan instances to trusted IP addresses only
iptables -A INPUT -p tcp --dport 3000 -s trusted_ip_range -j ACCEPT
iptables -A INPUT -p tcp --dport 3000 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted networks only
- Monitor for unusual access patterns to the cards.js endpoint and investigate anomalies
🔍 How to Verify
Check if Vulnerable:
Check WeKan version: if version is 8.20 or lower, the system is vulnerableCheck Version:
Check WeKan admin panel or run: docker inspect wekan/wekan | grep WEKAN_VERSIONVerify Fix Applied:
Verify version is 8.21 or higher and test that card data access follows proper authorization📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to /publications/cards.js endpoint
- Multiple failed authentication attempts followed by successful card data access
Network Indicators:
- External IP addresses accessing card publication endpoints without prior authentication
SIEM Query:
source="wekan" AND (uri_path="/publications/cards.js" OR uri_path="/cards") AND http_status=200 AND NOT user_agent="browser_agent"