Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Tmux Mcp

tmux-mcp-rs is a Model Context Protocol (MCP) server for tmux.

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.rs, line 2378 "/home/user/.ssh/id_rsa",

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

    npm/tmux-mcp-rs/bin/tmux-mcp-rs.js, line 166

    fs.rmSync(tmp, { force: true, recursive: true });

    scripts/resolve-version.sh, line 18

    subprocess.check_output(["cargo", "metadata", "--no-deps", "--format-version", "1"])

    src/commands.rs, line 428

    match commands.get(command_id) {

    Show more

    src/commands.rs, line 500

    commands.get(id).cloned()

  • 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

    npm/tmux-mcp-rs/bin/tmux-mcp-rs.js, line 173

    const request = https.get(

    src/security.rs, line 1820

    assert!(policy.check_command("git status && curl evil").is_err());

    src/security.rs, line 1838

    assert!(policy.check_command("git status & curl evil").is_err());

    Show more

    src/security.rs, line 1839

    assert!(policy.check_command("git status && curl evil").is_err());

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_CREDENTIAL

    src/security.rs, line 2378

    "/home/user/.ssh/id_rsa",

    README.md, line 517

    tmux-mcp-rs --ssh "-i ~/.ssh/key user@host"

  • 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

    src/server.rs, line 1

    //! stdio MCP server: tool router, input/output schemas, and dynamic resources.

  • 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 c4762ea36b1a. 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: c4762ea36b1a288a95ba5cc125154fae65a60ad5

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