CVE-2026-0760
📋 TL;DR
CVE-2026-0760 is a critical remote code execution vulnerability in Foundation Agents MetaGPT's deserialize_message function. Attackers can exploit this without authentication by sending malicious serialized data, allowing arbitrary code execution as the service account. All systems running vulnerable versions of MetaGPT are affected.
💻 Affected Systems
- Foundation Agents MetaGPT
📦 What is this software?
Metagpt by Deepwisdom
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining persistent access, data exfiltration, lateral movement, and deployment of ransomware or other malware.
Likely Case
Remote code execution leading to service disruption, data theft, and potential backdoor installation for future attacks.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only service disruption if execution is contained.
🎯 Exploit Status
ZDI-CAN-28121 indicates proof-of-concept exists in controlled environment. The vulnerability requires sending specially crafted serialized data to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-26-026/
Restart Required: Yes
Instructions:
1. Check current MetaGPT version
2. Apply vendor-provided patch or update to fixed version
3. Restart MetaGPT service
4. Verify patch application
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to MetaGPT service to only trusted sources
iptables -A INPUT -p tcp --dport [META_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [META_PORT] -j DROP
Input Validation Filter
allImplement WAF or proxy to filter malicious serialized data
🧯 If You Can't Patch
- Isolate the MetaGPT system from internet and untrusted networks
- Implement strict network monitoring and alerting for suspicious deserialization attempts
🔍 How to Verify
Check if Vulnerable:
Check if MetaGPT version is unpatched and deserialize_message function is exposed to network inputCheck Version:
Check MetaGPT configuration or package manager for version informationVerify Fix Applied:
Verify MetaGPT version matches patched version from vendor advisory and test with safe serialized data📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors
- Unexpected process execution from MetaGPT service account
- Abnormal network connections from MetaGPT process
Network Indicators:
- Malformed serialized data packets to MetaGPT port
- Unexpected outbound connections from MetaGPT host
SIEM Query:
source="metagpt.logs" AND (event="deserialize_error" OR process_execution="unusual")