---
title: "CVE-2026-51856: agentscope - Remote Code Execution"
description: "agentscope 1.0.18, 1.0.19 contains a remote code execution caused by unprotected execute_python_code tool exposure in RealtimeAgent session, letting remote WebSocket users execute arbitrary Python code, exploit requires WebSocket access."
url: https://panop.io/threat-heartbeat/CVE-2026-51856/
---

# CVE-2026-51856 agentscope - Remote Code Execution

agentscope 1.0.18, 1.0.19 contains a remote code execution caused by unprotected execute\_python\_code tool exposure in RealtimeAgent session, letting remote WebSocket users execute arbitrary Python code, exploit requires WebSocket access.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.33% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-51856)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-94](https://cwe.mitre.org/data/definitions/94.html)

## Vendor fix

Update to the latest version where execute\_python\_code tool is properly secured or removed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-51856](https://nvd.nist.gov/vuln/detail/CVE-2026-51856)
- [https://gist.github.com/Ro1ME/c383f66d1fd6de40b6693f9b6cc181e7](https://gist.github.com/Ro1ME/c383f66d1fd6de40b6693f9b6cc181e7)
- [https://github.com/agentscope-ai/agentscope/issues/1563](https://github.com/agentscope-ai/agentscope/issues/1563)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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