๐Ÿ›ก๏ธ CVE-2026-25905
๐ŸŸก CVSS 5.8 โ€” Medium โœ… No Known Exploit CWE-653 NVD
5.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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. Note - the "mcp-run-python" project is archived and unlikely to receive a fix.

Details

Severity Medium
CVSS Score 5.8
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
CWE CWE-653
Public Exploit โœ… No
Source NVD
Published 2026-02-09
Updated 2026-06-02
Modified 2026-02-12
Fix URL N/A

Affected Packages

Software From version Fixed in
mcp-run-python โ€” โ€”
unknown โ€” โ€”

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