CVE-2026-51856

In agentscope 1.0.18, 1.0.19, and 1.0.19 when the RealtimeAgent session exposes execute_python_code as an available tool, a remote WebSocket user can prompt the agent to call that tool and run Python code in the service environment. In the validated path, RealtimeAgent._acting forwards the model-produced tool call to Toolkit.call_tool_function, which invokes execute_python_code without an additional approval or isolation boundary on that path.

  • Published Sep 30, 2026
  • CVSS 9.8 critical
  • 0.3% chance of exploitation in the next 30 days (EPSS)

CVE-2026-51856 at the National Vulnerability Database