CVE-2026-0716
📋 TL;DR
A buffer read vulnerability in libsoup's WebSocket frame processing allows reading memory outside intended bounds when maximum incoming payload size is unset. This can cause memory exposure or crashes. Applications using libsoup's WebSocket support with non-default configurations are affected.
💻 Affected Systems
- libsoup
- Applications using libsoup WebSocket support
⚠️ 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
Memory exposure leading to information disclosure or denial of service through application crashes.
Likely Case
Application instability or crashes when processing malformed WebSocket frames.
If Mitigated
No impact if using default configuration or proper payload size limits.
🎯 Exploit Status
Requires ability to send WebSocket frames to vulnerable endpoint with specific configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2026-0716
Restart Required: Yes
Instructions:
1. Check current libsoup version
2. Apply vendor-provided patches
3. Restart affected applications
4. Verify fix applied
🔧 Temporary Workarounds
Set maximum WebSocket payload size
linuxConfigure libsoup to use default or explicit maximum incoming payload size for WebSocket connections
Configure application to set soup_websocket_connection_new_with_protocols() with proper max_incoming_payload_size
🧯 If You Can't Patch
- Disable WebSocket functionality in affected applications
- Implement network controls to restrict WebSocket traffic to trusted sources only
🔍 How to Verify
Check if Vulnerable:
Check if application uses libsoup WebSocket with unset max_incoming_payload_size configurationCheck Version:
pkg-config --modversion libsoup-2.4Verify Fix Applied:
Verify libsoup version is patched and configuration uses proper payload size limits📡 Detection & Monitoring
Log Indicators:
- Application crashes
- Memory access violation errors
- WebSocket connection failures
Network Indicators:
- Unusually large WebSocket frames
- Malformed WebSocket traffic patterns
SIEM Query:
Search for libsoup-related crashes or WebSocket connection anomalies