CVE-2026-0772
📋 TL;DR
This vulnerability allows authenticated remote attackers to execute arbitrary code on Langflow installations by exploiting insecure deserialization in the disk cache service. Attackers can leverage this to run commands with the service account's privileges. Only Langflow installations with the vulnerable disk cache service are affected.
💻 Affected Systems
- Langflow
📦 What is this software?
Langflow by Langflow
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary code with service account privileges, potentially leading to data theft, lateral movement, or complete system takeover.
Likely Case
Authenticated attackers gaining remote code execution on vulnerable Langflow instances, enabling data exfiltration, installation of backdoors, or service disruption.
If Mitigated
Limited impact due to proper network segmentation, authentication controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Authentication is required, but once authenticated, exploitation is relatively straightforward for attackers familiar with deserialization attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-26-038/
Restart Required: Yes
Instructions:
1. Check current Langflow version
2. Apply vendor-provided patch or update to fixed version
3. Restart Langflow services
4. Verify patch application
🔧 Temporary Workarounds
Disable disk cache service
allTemporarily disable the vulnerable disk cache component if not essential
Check Langflow configuration for disk cache settings and disable
Restrict network access
allLimit access to Langflow services to trusted networks only
Configure firewall rules to restrict Langflow port access
🧯 If You Can't Patch
- Implement strict authentication controls and monitor for suspicious activity
- Isolate vulnerable systems in segmented network zones with limited access
🔍 How to Verify
Check if Vulnerable:
Check Langflow version against vendor advisory and verify disk cache service is enabledCheck Version:
langflow --version or check Langflow configuration/interfaceVerify Fix Applied:
Verify Langflow version is updated to patched version and test deserialization attempts are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization attempts in Langflow logs
- Suspicious process execution from Langflow service account
- Authentication logs showing successful logins followed by cache manipulation
Network Indicators:
- Unusual outbound connections from Langflow service
- Suspicious payloads sent to Langflow disk cache endpoints
SIEM Query:
source="langflow.log" AND ("deserialization" OR "cache" OR "untrusted data")