Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Perenna

Perenna, an MCP server listed in the PlugVet directory.

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 3c9ee1847c10, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    scripts/publish_mcp_registry.py, line 34 run_command: Callable[..., subprocess.CompletedProcess[str]] = subprocess.run,

  • NETWORK_NO_FIXED_HOST Low

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

    src/perenna/core.py, line 274 remote_commit = self.repository.fetch(remote, branch)

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .dockerignore, line 7 .env

  • OBFUSCATION_FILE_OVER_READ_CAP Note

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

    uv.lock, line 1 version = 1

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

    scripts/publish_mcp_registry.py, line 34

    run_command: Callable[..., subprocess.CompletedProcess[str]] = subprocess.run,

    src/perenna/deploy_keys.py, line 63

    result = subprocess.run(

    src/perenna/deploy_keys.py, line 167

    result = subprocess.run(

    Show more

    src/perenna/git.py, line 475

    result = subprocess.run(

    src/perenna/skill_installer.py, line 210

    shutil.rmtree(staging, ignore_errors=True)

    src/perenna/skill_installer.py, line 275

    shutil.rmtree(path)

    .github/workflows/publish.yml, line 66

    return subprocess.check_output(

    .github/workflows/publish.yml, line 83

    previous_tag = subprocess.check_output(

  • 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

    src/perenna/core.py, line 274

    remote_commit = self.repository.fetch(remote, branch)

    src/perenna/core.py, line 326

    remote_commit = self.repository.fetch(remote, branch)

    src/perenna/git.py, line 278

    def fetch(self, remote: str, branch: str, timeout: int = PUSH_TIMEOUT_SECONDS) -> str | None:

    Show more

    src/perenna/sync.py, line 92

    remote_head = repository.fetch(remote_name, branch)

    src/perenna/sync.py, line 112

    confirmed = repository.fetch(remote_name, branch)

    src/perenna/sync.py, line 136

    confirmed = repository.fetch(remote_name, branch)

    src/perenna/sync.py, line 199

    remote_head = repository.fetch(remote_name, branch)

    Dockerfile, line 25

    CMD ["python", "-c", "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/healthz', timeout=3)"]

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .dockerignore, line 6

    __pycache__

    .dockerignore, line 7

    .env

    .dockerignore, line 9

    !.env.example

    Show more

    .gitignore, line 150

    # Environments

    docs/guides/self-hosting.md, line 82

    sudo install -m 600 .env.example /etc/perenna/perenna.env

    docs/guides/self-hosting.md, line 183

    Replace `vX.Y.Z` with the release tag to deploy. Review `.env.example` for newly

  • 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.

Get the full report on this tool, £49

Note

Hygiene check of commit 3c9ee1847c10. can delete files. 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: 3c9ee1847c10a6fc1479e947f18a018ff6f47b53

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