Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Yarr MCP

Self-hosted media fleet operations across Sonarr, Radarr, Plex, and related apps over MCP and CLI.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 357b86a856d7, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST SECRETS_PATH_DOTENV INSTALL_DOCUMENTED_INSTALLER SECRETS_ENV_READ OBFUSCATION_FILE_CAP_REACHED

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    packages/yarr-mcp/lib/download.js, line 134 fs.rmSync(partial, { force: true });

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    CLAUDE.md, line 306 just health # curl http://localhost:40070/health | jq .

  • NETWORK_UNNAMED_HOST Low

    Calls a fixed host that the description does not name.

    CLAUDE.md, line 306 just health # curl http://localhost:40070/health | jq .

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    packages/yarr-mcp/scripts/check-package.js, line 244 ".env",

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    README.md, line 95 curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    packages/yarr-mcp/scripts/check-package.js, line 418 const token = process.env.GH_TOKEN || process.env.GITHUB_TOKEN;

  • OBFUSCATION_FILE_CAP_REACHED Note

    The 400 file cap was reached before every file was read.

    scripts/bump-version.sh, line 1 #!/usr/bin/env bash

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    packages/yarr-mcp/lib/download.js, line 134

    fs.rmSync(partial, { force: true });

    packages/yarr-mcp/lib/download.js, line 140

    fs.rmSync(partial, { force: true });

    packages/yarr-mcp/lib/download.js, line 141

    fs.rmSync(destination, { force: true });

    Show more

    packages/yarr-mcp/scripts/check-package.js, line 569

    fs.rmSync(tempDir, { recursive: true, force: true });

    packages/yarr-mcp/scripts/install.js, line 74

    fs.rmSync(destination, { force: true });

    packages/yarr-mcp/scripts/install.js, line 78

    fs.rmSync(staging, { recursive: true, force: true });

    packages/yarr-mcp/scripts/install.js, line 87

    fs.rmSync(destination, { force: true });

    packages/yarr-mcp/scripts/install.js, line 167

    fs.rmSync(tempDir, { recursive: true, force: true });

    scripts/check-blob-size.py, line 27

    result = subprocess.run(["git", *args], check=True, capture_output=True, text=True)

    scripts/check-doc-links.py, line 33

    completed = subprocess.run(

    scripts/check-plugin-hook-contract.py, line 141

    subprocess.run(["bash", "-n", str(hook)], check=True)

    scripts/check-plugin-hook-contract.py, line 160

    output = subprocess.run(

  • Install and update

    Note

    README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    README.md, line 95

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    README.md, line 535

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    docs/DEPLOYMENT.md, line 53

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    Show more

    docs/PATTERNS.md, line 819

    # One-line install: curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    docs/QUICKSTART.md, line 38

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    docs/SCRIPTS.md, line 45

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/scripts/install.sh | bash

    docs/SCRIPTS.md, line 121

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    docs/SYSTEMD.md, line 35

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    packages/yarr-mcp/README.md, line 95

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    packages/yarr-mcp/README.md, line 535

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    plugins/yarr/README.md, line 123

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/install.sh | bash

    scripts/README.md, line 194

    curl -fsSL https://raw.githubusercontent.com/dinglebear-ai/yarr/main/scripts/install.sh | bash

  • Network

    Concern

    can reach a host that is not written as a fixed address. can reach server1. The description does not name that host. can reach server2. The description does not name that host. can reach example.com. The description does not name that host. can reach api.themoviedb.org. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    CLAUDE.md, line 306

    just health # curl http://localhost:40070/health | jq .

    install.sh, line 60

    curl --fail-with-body --silent --show-error --location --max-redirs 5 \

    install.sh, line 169

    for command in curl tar mktemp python3 sha256sum install; do need "$command"; done

    Show more

    packages/yarr-mcp/scripts/check-package.js, line 343

    const request = https.request(url, { method: "HEAD" }, (response) => {

    packages/yarr-mcp/scripts/check-package.js, line 429

    const request = https.request(

    plugins/bazarr/skills/bazarr/scripts/bazarr-api.sh, line 6

    command curl --fail-with-body --silent --show-error \

    plugins/bazarr/skills/bazarr/scripts/bazarr-api.sh, line 29

    resp=$(curl -sS -X "$method" -w $'\n%{http_code}' -H "$AUTH" "$API$path") || {

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 9

    command curl --fail-with-body --silent --show-error \

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 38

    curl -sS -X "$method" \

    plugins/plex/skills/plex/references/api-endpoints.md, line 29

    curl -X POST "https://plex.tv/users/sign_in.json" \

    plugins/plex/skills/plex/references/quick-reference.md, line 36

    curl -X POST "https://plex.tv/users/sign_in.json" \

    plugins/plex/skills/plex/references/quick-reference.md, line 298

    curl -s "https://plex.tv/api/v2/shared_servers" \

    plugins/plex/skills/plex/references/troubleshooting.md, line 292

    curl -s "https://plex.tv/api/v2/user" -H "X-Plex-Token: $PLEX_TOKEN"

    plugins/qbittorrent/skills/qbittorrent/references/api-endpoints.md, line 25

    curl -X POST "http://localhost:8080/api/v2/auth/login" \

    plugins/qbittorrent/skills/qbittorrent/references/api-endpoints.md, line 31

    curl "http://localhost:8080/api/v2/torrents/info" \

    plugins/sabnzbd/skills/sabnzbd/references/troubleshooting.md, line 29

    curl -s "http://localhost:8080/api?mode=version&apikey=<your_api_key>"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    packages/yarr-mcp/scripts/check-package.js, line 244

    ".env",

    packages/yarr-mcp/scripts/check-package.js, line 418

    const token = process.env.GH_TOKEN || process.env.GITHUB_TOKEN;

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 22

    elif [[ -f "$HOME/.lab/.env" ]]; then

    Show more

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 25

    source "$HOME/.lab/.env"

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 29

    : "${JELLYFIN_URL:?set JELLYFIN_URL in plugin settings or ~/.lab/.env}"

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 30

    : "${JELLYFIN_API_KEY:?set JELLYFIN_API_KEY in plugin settings or ~/.lab/.env}"

    plugins/jellyfin/skills/jellyfin/scripts/jellyfin-api.sh, line 70

    JELLYFIN_URL and JELLYFIN_API_KEY from lab-jellyfin config or ~/.lab/.env.

    plugins/overseerr/skills/overseerr/scripts/lib.mjs, line 24

    // Load .env file on import

    plugins/plex/skills/plex/scripts/plex-api.sh, line 21

    # Load credentials from .env

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    the file cap was reached before every file was read.

    OBFUSCATION_FILE_CAP_REACHED

    scripts/bump-version.sh, line 1

    #!/usr/bin/env bash

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit 357b86a856d7. can delete files. README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. can reach server1. The description does not name that host. can reach server2. The description does not name that host. can reach example.com. The description does not name that host. can reach api.themoviedb.org. The description does not name that host. reads a credential or environment file. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: 357b86a856d7f9d5e050a2b183980da7f5d19a3a

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen