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MCP server for *arr media management suite - Sonarr, Radarr, Lidarr, Readarr, Prowlarr

mcp-arr-server013 files scannedApril 4, 2026

High risk — review the findings below

We found multiple concerning patterns in this package. Some of these might be legitimate (for example, a build tool might need to run commands), but you should review each finding below and decide if the explanations make sense for what this package claims to do.

What We Found(6 issues)

Each card explains what was found and what it means in plain English. Click "Technical details" for the full breakdown.

HIGHHIGH-005

Caution. This package reads your secret passwords and API tokens from your system. If it also has network access, your credentials could be sent to someone else's server. Check WHY it needs your secrets.

Technical details

Reading sensitive environment variables (tokens, secrets, keys, passwords) suggests data exfiltration. MCP servers should declare required env vars, not silently read secrets.

process.env.SONARR_API_KEY
src/index.ts:42
HIGHHIGH-005

Caution. This package reads your secret passwords and API tokens from your system. If it also has network access, your credentials could be sent to someone else's server. Check WHY it needs your secrets.

Technical details

Reading sensitive environment variables (tokens, secrets, keys, passwords) suggests data exfiltration. MCP servers should declare required env vars, not silently read secrets.

process.env.RADARR_API_KEY
src/index.ts:43
HIGHHIGH-005

Caution. This package reads your secret passwords and API tokens from your system. If it also has network access, your credentials could be sent to someone else's server. Check WHY it needs your secrets.

Technical details

Reading sensitive environment variables (tokens, secrets, keys, passwords) suggests data exfiltration. MCP servers should declare required env vars, not silently read secrets.

process.env.LIDARR_API_KEY
src/index.ts:44
HIGHHIGH-005

Caution. This package reads your secret passwords and API tokens from your system. If it also has network access, your credentials could be sent to someone else's server. Check WHY it needs your secrets.

Technical details

Reading sensitive environment variables (tokens, secrets, keys, passwords) suggests data exfiltration. MCP servers should declare required env vars, not silently read secrets.

process.env.READARR_API_KEY
src/index.ts:45
HIGHHIGH-005

Caution. This package reads your secret passwords and API tokens from your system. If it also has network access, your credentials could be sent to someone else's server. Check WHY it needs your secrets.

Technical details

Reading sensitive environment variables (tokens, secrets, keys, passwords) suggests data exfiltration. MCP servers should declare required env vars, not silently read secrets.

process.env.PROWLARR_API_KEY
src/index.ts:46
MEDIUMMED-003

Suspicious. This package downloads code from paste sites or raw URLs instead of using normal package managers. This is a common trick to sneak in malicious code that doesn't show up in the package itself.

Technical details

Network requests to paste sites or raw GitHub content may indicate payload downloading. Legitimate dependencies use npm, not pastebins.

raw.githubusercontent
src/trash-client.ts:10

Finding Summary

0

Critical

5

High

1

Medium

0

Low

0

Info