Is karellen-lsp-mcp safe to install?

karellen-lsp-mcp was flagged as CRITICAL RISK (risk score 65) with 2 findings detected across 20 files. Review the findings before installing.

What security issues were found in karellen-lsp-mcp?

Sigil detected 2 findings in karellen-lsp-mcp, including patterns related to code_patterns, install_hooks. See the full scan report for details.

Scans/pypi/karellen-lsp-mcp

karellen-lsp-mcp

pypi

Summary

karellen-lsp-mcp v0.1.2.dev20260320015211 was classified as CRITICAL RISK with a risk score of 65. Sigil detected 2 findings across 20 files, covering phases including code patterns, install hooks. Review the findings below before installing this package.

Package description: MCP Server bridging to LSP servers for structured code introspection

CRITICAL RISK(65)

v0.1.2.dev20260320015211

20 March 2026, 03:13 UTC

by Sigil Bot

Risk Score

Findings

Files Scanned

Provenance

Registry

https://pypi.org/project/karellen-lsp-mcp/0.1.2.dev20260320015211/

Findings by Phase

•

Phase Ordering

Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.

install-setup-py-cmdclass

CRITICAL

setup.py overrides cmdclass — may execute code during install

karellen_lsp_mcp-0.1.2.dev20260320015211/setup.py:72

        zip_safe = True,
        cmdclass = {'install': install},
        python_requires = '>=3.10',

Why was this flagged?

This package overrides Python's setup.py cmdclass, which allows arbitrary code to execute during pip install. This is the primary attack vector for malicious PyPI packages — attackers use it to steal credentials, install backdoors, or download additional payloads before the developer ever runs the code. Rated CRITICAL because it executes automatically with no user interaction required.

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