Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Self-hosted GitHub MCP server

Self-hosted GitHub MCP server.

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings before installing.

Graded by PlugVetRubric v2

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

PERMISSION_SHELL_UNDECLARED

Why this grade

  • PERMISSION_SHELL_UNDECLARED Medium

    Runs shell commands that the manifest or description does not mention.

    github_mcp/client.py, line 41 result = subprocess.run(

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

    requests shell access. No manifest field names shell or command execution.

    PERMISSION_SHELL_UNDECLARED

    github_mcp/client.py, line 41

    result = subprocess.run(

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    hooks/install-ping.py, line 40

    urllib.request.urlopen(req, timeout=3).read()

    pyproject.toml, line 12

    # SSRF hardening for outbound GitHub API fetch (MYC-101).

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_UNCONFIRMED

    github_mcp/client.py, line 70

    token = os.environ.get("GITHUB_TOKEN") or os.environ.get("GH_TOKEN")

    .github/workflows/personal-pii-scrub.yml, line 167

    m=$(git grep -nE "$p" -- ':!README*' ':!CHANGELOG*' ':!docs/' ':!*.md' ':!LICENSE*' ':!COPYING*' ':!NOTICE*' ':!AUTHORS*' ':!MAINTAI

    .github/workflows/personal-pii-scrub.yml, line 330

    m=$(grep -rnaE --exclude='README*' --exclude='CHANGELOG*' --exclude='*.md' --exclude='LICENSE*' --exclude='COPYING*' --exclude='NOTICE*'

  • Agent instructions

    Pass

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

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    uv.lock, line 1

    version = 1

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit d7a6f9b2e5b4. requests shell access. No manifest field names shell or command execution. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: d7a6f9b2e5b4871d427040a75a7abcad81bd412c

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