Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Oauth2 Mcp

Oauth2 Mcp, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade C

One Medium finding. Read the report before installing.

Graded by PlugVetRubric v2

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

NETWORK_HOST_FROM_INPUT

Why this grade

  • NETWORK_HOST_FROM_INPUT Medium

    A file takes a URL or endpoint as input and has no fixed host list.

    lib/oauth2/mcp.rb, line 86 headers = request.fetch(:headers, request.fetch("headers", nil)) if request.respond_to?(:fetch)

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

    accepts a host from input, with no fixed list in this file. can reach auth.example.com. The description does not name that host. can reach a host that is not written as a fixed address.

    NETWORK_HOST_FROM_INPUT NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    lib/oauth2/mcp.rb, line 86

    headers = request.fetch(:headers, request.fetch("headers", nil)) if request.respond_to?(:fetch)

    lib/oauth2/mcp.rb, line 122

    mapped = mapping.fetch(scope.to_s, [])

    lib/oauth2/mcp.rb, line 169

    keys = jwks.fetch(:keys, jwks.fetch("keys", jwks))

    Show more

    lib/oauth2/mcp.rb, line 190

    @jwks ||= fetch_json(configuration.fetch("jwks_uri"))

    lib/oauth2/mcp.rb, line 282

    @algorithms = Array(options.fetch(:algorithms, ["RS256"])).map(&:to_s).freeze

    lib/oauth2/mcp.rb, line 283

    @leeway = options.fetch(:leeway, 60)

    spec/oauth2/mcp_spec.rb, line 222

    expect(discovery.configuration.fetch("jwks_uri")).to eq("https://auth.example.com/jwks.json")

    spec/oauth2/mcp_spec.rb, line 459

    result = env.fetch(OAuth2::MCP::RackMiddleware::AUTHORIZATION_ENV_KEY)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .env.local.example, line 4

    # COPY THIS FILE TO .env.local

    .env.local.example, line 7

    # mise loads .env.local via dotenvy, so use KEY=value lines (not shell `export` statements).

    .env.local.example, line 9

    DEBUG=false # do not allow byebug statements (override in .env.local)

    Show more

    .env.local.example, line 10

    FLOSS_FUNDING_DEBUG=false # extra logging to help diagnose issues (override in .env.local)

    .gitignore, line 43

    # Local environment overrides (KEY=value, loaded by mise via dotenvy)

    .simplecov, line 9

    # (with optional machine-local overrides in `.env.local`).

    .structuredmerge/kettle-jem.lock, line 74

    ".env.local.example": 35cb867e8bacb75252a85c29f78899b36d0d1843511ae1ba1fbc7da863b128b3

    .structuredmerge/kettle-jem.lock, line 288

    ".env.local.example":

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

    contains a minified payload. contains an encoded blob in a file that should be readable.

    OBFUSCATION_ENCODED_BLOB OBFUSCATION_MINIFIED_PAYLOAD

    docs/js/jquery.js, line 2

    (function(a,b){function cy(a){return f.isWindow(a)?a:a.nodeType===9?a.defaultView||a.parentWindow:!1}function cv(a){if(!ck[a]){var b=c.body,d=f("<"+a+">").appendTo(b),e=d.css("disp

    docs/js/jquery.js, line 3

    f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3||a.nodeType===8||!c||!d||!(h=f._data(a)))){d.handler&&(p=d,d=p.handler),d.guid||(d.guid=f.guid++),j

    docs/js/jquery.js, line 4

    {for(var a=0,b;(b=this[a])!=null;a++){b.nodeType===1&&f.cleanData(b.getElementsByTagName("*"));while(b.firstChild)b.removeChild(b.firstChild)}return this},clone:function(a,b){a=a==

    Show more

    docs/css/full_list.css, line 41

    background: url(data:image/gif;base64,R0lGODlhEAAQAPYAAP///wAAAPr6+pKSkoiIiO7u7sjIyNjY2J6engAAAI6OjsbGxjIyMlJSUuzs7KamppSUlPLy8oKCghwcHLKysqSkpJqamvT09Pj4+KioqM7OzkRERAwMDGBgYN7e3u

    docs/css/full_list.css, line 84

    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAASCAYAAABb0P4QAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAK8AAACvABQqw0mAAAABx0RVh0U29mdHdhcmUAQWRvYmUgRmlyZXdvcmtzIENTM5

    docs/css/style.css, line 745

    background: url(data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAACXBIWXMAAAsTAAALEwEAmpwYAAAKT2lDQ1BQaG90b3Nob3AgSUNDIHByb2ZpbGUAAHjanVNnVFPpFj333vRCS4iAlEtvUh

  • Licence

    Pass

    A licence file is present (LICENSE.md).

  • 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 3d9a258b4e5b. accepts a host from input, with no fixed list in this file. can reach auth.example.com. The description does not name that host. can reach a host that is not written as a fixed address. reads a credential or environment file. contains a minified payload. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: 3d9a258b4e5bc5f7c00e1db02233ea3c900d9c27

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