Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Mcp Bastion

Mcp Bastion, 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.

SECRETS_PATH_CREDENTIAL

Why this grade

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/security/engine.ts, line 343 * to catch a call that reads a sensitive source (e.g. `~/.ssh/id_rsa`, `.env`) as the first

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/audit/sinks/otlp.ts, line 123

    const res = await fetch(this.url, {

    src/audit/sinks/webhook.ts, line 57

    const res = await fetch(this.opts.url, {

    src/core/upstream-connection.ts, line 248

    if (!ctx) return fetch(url, init);

    Show more

    src/core/upstream-connection.ts, line 262

    return fetch(url, { ...init, headers });

    src/proxy/http-server.ts, line 244

    handler.fetch(webReq, { authInfo, parsedBody: body }),

    src/security/command-injection.ts, line 6

    * (`; rm …`, `| curl …`), or a read of a classic exfiltration target (`/etc/passwd`). This scans the

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    src/audit/engine.ts, line 48

    this.integrityKey = config.integrityKey ?? process.env.MCP_BASTION_AUDIT_KEY;

    src/core/delegation-gate.ts, line 119

    process.env.MCP_BASTION_SUBJECT_KEY ??

    src/security/engine.ts, line 343

    * to catch a call that reads a sensitive source (e.g. `~/.ssh/id_rsa`, `.env`) as the first

    Show more

    src/core/delegation-gate.ts, line 121

    process.env.MCP_BASTION_AUDIT_KEY ??

    src/core/upstream-manager.ts, line 69

    config.security.requestStateKey ?? process.env.MCP_BASTION_REQUEST_STATE_KEY;

    src/security/poisoning.ts, line 38

    /(\.ssh\b|id_rsa|\.env\b|\bcredentials?\b|\bapi[_-]?keys?\b|\bpasswords?\b|\bsecret[_-]?keys?\b)/i,

    .gitignore, line 14

    # Environment / secrets

    .gitignore, line 15

    .env

    .gitignore, line 17

    !.env.example

    CHANGELOG.md, line 438

    (e.g. `~/.ssh/id_rsa`, `.env`) and exfiltration signals, catching the read leg of a cross-tool

    README.md, line 196

    | `servers.<name>.env` | map | - | Env overrides merged over the process env.

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • 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 e35b86d4d7f8. can reach a host that is not written as a fixed address. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: e35b86d4d7f88fce5985a3f887853360664ea26f

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