CVE-2026-30840
📋 TL;DR
Wallos versions before 4.6.2 contain a server-side request forgery vulnerability in notification testers that allows attackers to make unauthorized requests from the server to internal systems. This affects all self-hosted Wallos instances running vulnerable versions. Attackers could potentially access internal services or exfiltrate data.
💻 Affected Systems
- Wallos
⚠️ 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 access internal services, exfiltrate sensitive data, or pivot to other systems on the network, potentially leading to full network compromise.
Likely Case
Unauthorized access to internal HTTP services, metadata services, or file retrieval from internal systems accessible to the Wallos server.
If Mitigated
Limited impact if network segmentation restricts server access to only necessary services and proper input validation is in place.
🎯 Exploit Status
Exploitation requires access to notification testing functionality, which typically requires authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.6.2
Vendor Advisory: https://github.com/ellite/Wallos/security/advisories/GHSA-mr2c-prqv-hqm8
Restart Required: Yes
Instructions:
1. Backup your Wallos data and configuration. 2. Download version 4.6.2 from GitHub releases. 3. Replace existing installation files with new version. 4. Restart the Wallos service or web server.
🔧 Temporary Workarounds
Disable notification testing
allTemporarily disable or restrict access to notification testing functionality
Network segmentation
allRestrict Wallos server network access to only required services
🧯 If You Can't Patch
- Implement strict network segmentation to limit Wallos server access to only necessary internal services
- Add web application firewall rules to block SSRF patterns and restrict outbound requests from the application
🔍 How to Verify
Check if Vulnerable:
Check Wallos version in admin interface or by examining package files; versions below 4.6.2 are vulnerable.Check Version:
Check Wallos admin dashboard or examine package.json/version files in installation directoryVerify Fix Applied:
Confirm version is 4.6.2 or higher in admin interface and verify notification testers validate URLs properly.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from Wallos server
- Multiple failed notification test attempts
- Requests to internal IP addresses from Wallos
Network Indicators:
- Wallos server making unexpected HTTP requests to internal services
- Traffic to metadata services (169.254.169.254) from Wallos
SIEM Query:
source="wallos" AND (http_request OR url_request) AND (dst_ip=10.* OR dst_ip=172.16.* OR dst_ip=192.168.* OR dst_ip=169.254.169.254)