Foundation Agents MetaGPT operator.py code_generate Code Injection

Successful exploitation of CVE-2026-4515 allows an attacker to inject and execute arbitrary code on a system running vulnerable MetaGPT instances. This could lead to complete system compromise, including data exfiltration, malware installation, and denial of service. Given the remote accessibility of the vulnerability and the availability of a public exploit, the potential for widespread exploitation is significant. The impact is amplified if MetaGPT is integrated into critical workflows or processes, as an attacker could leverage this vulnerability to disrupt operations or gain access to sensitive information.

Organizations utilizing MetaGPT in automated workflows, particularly those involving external data sources or user-provided input, are at heightened risk. Systems running MetaGPT in production environments without proper security controls or monitoring are also particularly vulnerable. Shared hosting environments where multiple users share the same MetaGPT instance could facilitate lateral movement if one instance is compromised.

• python / server:

import os
import subprocess

def check_metagpt_version():
    try:
        result = subprocess.check_output(['pip', 'show', 'metagpt'], stderr=subprocess.STDOUT)
        version = result.decode('utf-8').split('Version: ')[1].strip()
        if '0.8.0' <= version <= '0.8.1':
            print(f"MetaGPT version {version} is vulnerable to CVE-2026-4515")
        else:
            print("MetaGPT version is not vulnerable.")
    except FileNotFoundError:
        print("MetaGPT is not installed.")
    except Exception as e:
        print(f"Error checking MetaGPT version: {e}")

check_metagpt_version()

• python / supply-chain: Examine Python dependencies for unusual or unexpected packages that might be exploiting the vulnerability. • generic web: Monitor access logs for requests targeting metagpt/ext/aflow/scripts/operator.py with unusual parameters.

1. 2026-03-21Disclosure

   disclosure

1. Reserviert2026-03-20
2. Veröffentlicht2026-03-21
3. Geändert2026-03-24
4. EPSS aktualisiert2026-03-28

The primary mitigation for CVE-2026-4515 is to upgrade to a patched version of MetaGPT as soon as it becomes available. Since a fixed version is not yet specified, consider isolating vulnerable instances to limit potential exposure. While a direct fix awaits, review the metagpt/ext/aflow/scripts/operator.py file for any unusual or unexpected code execution patterns. Implement strict input validation and sanitization for any data passed to the code_generate function to reduce the attack surface. After upgrading, confirm the fix by attempting to trigger the code injection vulnerability and verifying that it is no longer exploitable.