GHSA-PFV4-WMPH-5GC6 MCP Run Python has a Sandbox Escape & Server Takeover Vulnerability

Impact Critical Sandbox Escape & Server Takeover: A critical security vulnerability exists in mcp-run-python due to a lack of isolation between the Python runtime Pyodide and the host JavaScript environment. The runPython and runPythonAsync functions execute Python code using Pyodide without...

MCP Run Python has a Sandbox Escape & Server Takeover Vulnerability

Impact Critical Sandbox Escape & Server Takeover: A critical security vulnerability exists in mcp-run-python due to a lack of isolation between the Python runtime Pyodide and the host JavaScript environment. The runPython and runPythonAsync functions execute Python code using Pyodide without...

CVE-2026-25905

The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing...

CVE-2026-25905 Lack of isolation in mcp-run-python leads to MCP server takeover

The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing...

CVE-2026-25905

The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing...

CVE-2026-25905 Lack of isolation in mcp-run-python leads to MCP server takeover

The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing...

CVE-2026-25905

CVE-2026-25905 describes a lack of isolation between Python code executed by runPython/runPythonAsync and the surrounding JavaScript environment. This lets Python code access Pyodide APIs to modify the JS context, which could enable an attacker to hijack the MCP server and shadow MCP tooling. The...

PT-2026-7090

Name of the Vulnerable Software and Affected Versions MCP affected versions not specified Description The Python code executed by the 'runPython' or 'runPythonAsync' functions lacks isolation from other JavaScript code. This allows Python code to utilize Pyodide APIs to alter the JavaScript...

Critical Grist-Core Vulnerability Allows RCE Attacks via Spreadsheet Formulas

A critical security flaw has been disclosed in Grist‑Core, an open-source, self-hosted version of the Grist relational spreadsheet-database, that could result in remote code execution. The vulnerability, tracked as CVE-2026-24002 CVSS score: 9.1, has been codenamed Cellbreak by Cyera Research Lab...

CVE-2026-24002

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

CVE-2026-24002

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

CVE-2026-24002

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

CVE-2026-24002

CVE-2026-24002 – Grist sandbox escape vulnerability affects Grist Core (Grist open-source self-hosted spreadsheet/database). The issue arises when running formulas in the Pyodide sandbox on Node.js, where the sandbox barrier is insufficient, allowing an untrusted spreadsheet to escape to host exe...

CVE-2026-24002 pyodide sandbox option is insecure

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

CVE-2026-24002 pyodide sandbox option is insecure

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

CVE-2026-24002 pyodide sandbox option is insecure

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

EUVD-2026-4212

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox...

Grist injection vulnerability

Grist is a modern relational spreadsheet developed by Grist Open Source. Versions of Grist prior to 1.7.9 had an injection vulnerability, which was caused by insufficient pyodide sandbox barriers. This vulnerability could allow for the execution of arbitrary processes on the server...

PT-2026-3906

Name of the Vulnerable Software and Affected Versions Grist versions prior to 1.7.9 Description Grist is spreadsheet software that utilizes Python as its formula language. When configured to run formulas in the Pyodide sandbox GRIST SANDBOX FLAVOR set to pyodide, a crafted spreadsheet formula can...

N8n < 2.0.0 Multiple Vulnerabilities

According to its banner, the version of n8n running on the remote host is 1.0.0 or later and before 2.0.0. It is, therefore, affected by multiple vulnerabilities: - An authenticated arbitrary file read and file write vulnerability - An authenticated arbitrary command execution vulnerability in...