CVE-2026-0771
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary Python code on Langflow installations through Python function components. Attackers can inject malicious code into workflows, potentially gaining full control of affected systems. 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 allowing attackers to execute arbitrary commands, steal sensitive data, install malware, pivot to other systems, and maintain persistent access.
Likely Case
Unauthorized code execution leading to data exfiltration, credential theft, and potential lateral movement within the network.
If Mitigated
Limited impact through network segmentation and proper access controls, potentially containing the attack to isolated environments.
🎯 Exploit Status
Exploitation requires access to modify workflows; authenticated users or API access needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-26-037/
Restart Required: Yes
Instructions:
1. Check current Langflow version
2. Update to patched version from official sources
3. Restart Langflow service
4. Verify update was successful
🔧 Temporary Workarounds
Restrict Python Function Access
allLimit user permissions to prevent unauthorized workflow modifications
Configure role-based access control to restrict Python function editing
Network Segmentation
allIsolate Langflow instances from sensitive systems
Implement firewall rules to restrict Langflow network access
🧯 If You Can't Patch
- Implement strict access controls and audit all workflow modifications
- Monitor for suspicious Python code execution and network connections
🔍 How to Verify
Check if Vulnerable:
Check Langflow version against vendor advisory; review workflow configurations for custom Python functionsCheck Version:
langflow --version or check package version in Python environmentVerify Fix Applied:
Verify Langflow version is updated to patched version; test Python function component security📡 Detection & Monitoring
Log Indicators:
- Unusual Python code execution patterns
- Unauthorized workflow modifications
- Suspicious import statements in function components
Network Indicators:
- Unexpected outbound connections from Langflow instances
- Command and control traffic patterns
SIEM Query:
Search for 'python_exec' or 'code_injection' events in Langflow logs combined with suspicious network activity