Is CVE-2026-51856 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-51856 being exploited in the wild.

How severe is CVE-2026-51856?

Informational severity, published 30 September 2026.

Which products and versions are affected?

Agentscope-Ai AgentScope 1.0.18, 1.0.19.

Is there a fix for CVE-2026-51856?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-51856 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-51856?

Check whether you run Agentscope-Ai AgentScope at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-51856: AgentScope RealtimeAgent incorrect access control in Python code execution

CVE-2026-51856 · Severity: info · Published 2026-09-30

AgentScope is a multi-agent AI framework that exposes tools to agents via WebSocket. When the RealtimeAgent service includes the execute_python_code tool, a remote WebSocket user can craft prompts that trick the agent into calling that tool, allowing arbitrary Python code execution on the server. This can lead to data theft, service disruption, or compromise of the hosting environment.

Technologies: Agentscope-Ai AgentScope. Vendors: Agentscope-Ai.

Quick answers

Is CVE-2026-51856 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-51856 being exploited in the wild.
How severe is CVE-2026-51856?: Informational severity, published 30 September 2026.
Which products and versions are affected?: Agentscope-Ai AgentScope 1.0.18, 1.0.19.
Is there a fix for CVE-2026-51856?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-51856 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-51856?: Check whether you run Agentscope-Ai AgentScope at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A remote WebSocket user connected to RealtimeAgent can send prompts that cause the AI model to invoke the execute_python_code tool without additional approval or isolation. The vulnerability exists in the call chain RealtimeAgent._acting → Toolkit.call_tool_function → execute_python_code, where the tool invocation lacks sandboxing or user approval gates. CWE-284 (Incorrect Access Control); requires network access and the execute_python_code tool to be registered in the session tool list.

Affected products

agentscope-ai AgentScope 1.0.18, 1.0.19

Timeline

2026-05-05: disclosed
2026-09-30: advisory

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.