CVE-2026-0770
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code as root on Langflow installations without authentication. The flaw exists in how the validate endpoint processes the exec_globals parameter, enabling remote code execution. All Langflow deployments using vulnerable versions are affected.
💻 Affected Systems
- Langflow
📦 What is this software?
Langflow by Langflow
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level code execution, data exfiltration, and persistent backdoor installation.
Likely Case
Remote code execution leading to data theft, cryptocurrency mining, or ransomware deployment.
If Mitigated
Limited impact if network segmentation and strict access controls prevent external access.
🎯 Exploit Status
No authentication required, simple HTTP request exploitation. ZDI advisory suggests weaponization is likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Langflow security advisory for specific version
Vendor Advisory: https://github.com/langflow-ai/langflow/security/advisories
Restart Required: Yes
Instructions:
1. Check Langflow security advisory for patched version. 2. Update Langflow to latest secure version. 3. Restart Langflow service.
🔧 Temporary Workarounds
Network Access Restriction
linuxBlock external access to Langflow validate endpoint
iptables -A INPUT -p tcp --dport [langflow-port] -s [allowed-ips] -j ACCEPT
iptables -A INPUT -p tcp --dport [langflow-port] -j DROP
Reverse Proxy Filtering
allConfigure reverse proxy to block requests containing exec_globals parameter
location /validate { if ($args ~* "exec_globals") { return 403; } }
🧯 If You Can't Patch
- Isolate Langflow instance in separate network segment with no internet access
- Implement strict firewall rules allowing only trusted IPs to access Langflow
🔍 How to Verify
Check if Vulnerable:
Check Langflow version against security advisory. Test with controlled payload to validate endpoint.Check Version:
Check Langflow web interface or package manager for versionVerify Fix Applied:
Verify Langflow version is updated to patched version. Test that exec_globals parameter no longer executes code.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /validate endpoint with exec_globals parameter
- Unusual process execution from Langflow service
Network Indicators:
- HTTP POST requests to validate endpoint with suspicious payloads
- Outbound connections from Langflow to unknown IPs
SIEM Query:
source="langflow" AND (url="/validate" AND (param="exec_globals" OR payload_contains="__import__" OR payload_contains="os.system"))