Grades are a hygiene check, not a security guarantee.

MCP, MCP server

ComfyUI Builder

Control ComfyUI from Claude or Cursor — 50+ MCP tools for node discovery, dynamic workflow building, real-time WebSocket execution, and model management.

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 72928ad410d0, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    src/comfyui-client.ts, line 40 const res = await fetch(normalizeUrl(url), {

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 12 .env

  • OBFUSCATION_FILE_OVER_READ_CAP Note

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

    knowledge/base-nodes.json, line 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

    Pass

    No shell or command execution found, and no extra permission was declared.

  • 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/comfyui-client.ts, line 40

    const res = await fetch(normalizeUrl(url), {

    src/comfyui-client.ts, line 278

    return fetch(targetUrl, {

    src/comfyui-client.ts, line 330

    const res = await fetch(normalizeUrl('upload/image'), {

    Show more

    src/manager-cli.ts, line 228

    fetch(`${baseUrl.replace(/\/$/, '')}/system_stats`, { method: 'GET' })

    src/manager-cli.ts, line 426

    const res = await fetch(url, { redirect: 'follow' });

    src/mcp-server.ts, line 946

    stream_progress: z.boolean().optional().describe('Stream progress updates via WebSocket (default true)'),

    src/output-manager.ts, line 134

    const res = await fetch(file.url);

    src/node-discovery/scanner.ts, line 23

    const res = await fetch(url, options as Parameters<typeof fetch>[1]);

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 11

    # Environment (secrets)

    .gitignore, line 12

    .env

    .gitignore, line 13

    .env.local

    Show more

    .npmignore, line 10

    # Env and local

    .npmignore, line 11

    .env

    doc/DOCKER-SETUP.md, line 93

    - `.env` file baked into the image (advanced, not covered here).

    doc/MCP-SETUP.md, line 258

    Or in `.env` file:

  • 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

    knowledge/base-nodes.json, line 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 72928ad410d0. 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: 72928ad410d04183c95fd5d1f5203f36065b24fb

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