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YawLabs/tailscale-mcp

YawLabs/tailscale-mcp vmain@b9c370d

Security Trust Score
Grade B · Moderate posture
Tier 1 · Public sourceHigh confidence · 89%
Declared MCP capabilities
Prompts

Host YawLabs/tailscale-mcp in a governed environment — SSO in front, every tool call attributed and audited.

Reputation29stars1forks1open issuestodaylast commit<1yage

Security controls

Deterministic, evidence-backed. Score earned from passing controls; a failed guard caps it.

Model–MCP Runtime Guardrails

  • Warn
    Strict JSON Schema Enforcementschemas not strict

    Tool inputs are constrained (additionalProperties:false), so unexpected arguments can't be smuggled in.

    Fix: Set additionalProperties:false and require explicit parameters on every tool.

  • Pass
    Indirect Prompt Injection (IPI) Defensesguardno injection markers

    Tool/prompt/resource text is free of hidden instructions that could hijack the agent.

  • Pass
    User-in-the-Loop / Approval Scopeguardno destructive tool scope

    No over-broad or destructive tools (arbitrary shell, bulk-delete) that warrant human approval.

  • N/A
    Tool Definition Integrityguardno prior version to diff

    Every consecutive version pair is diffed for new injection markers or destructive scope — a risky diff anywhere in history is a rug-pull (fail, durable); benign description drift warns.

Application Security Checks

  • Warn
    No dynamic code executionguard2 occurrences (build/test paths only)

    eval()/exec()/Function() on tool-derived strings allows arbitrary code execution.

    src/launcher.test.ts:31src/launcher.test.ts:112

    Fix: Remove eval/exec; parse and dispatch explicitly.

  • Warn
    No path traversalguard22 occurrences

    Naive path checks let tools read/write outside intended directories (EscapeRoute-class).

    scripts/build-binary-oam.mjs:60scripts/update-manifests.mjs:32src/api.test.ts:158src/api.test.ts:947

    Fix: Resolve to a canonical path and verify containment; reject ../ and symlinks.

  • Warn
    No SSRF sinksguard4 occurrences

    Fetching tool-supplied URLs can pivot into internal networks and metadata services.

    scripts/build-binary-oam.mjs:158scripts/build-binary-oam.mjs:165src/api.ts:138src/api.ts:562

    Fix: Allow-list destinations; reject arbitrary/loopback/link-local URLs.

  • Pass
    No command-injection sinksguardno sinks found

    Untrusted tool input reaching a shell yields remote code execution.

  • Pass
    No unsafe deserializationguardno sinks found

    pickle/yaml.load/etc. on untrusted data can execute code.

  • Pass
    No committed secretsguardno secrets found

    Hardcoded keys/tokens in published source are live credentials an attacker can use.

  • Pass
    Credentials sourced from environmentreads credentials from environment

    Reading secrets from env/secret stores avoids hardcoding them.

  • Pass
    Dependencies pinned (lockfile)lockfile present

    A lockfile makes installs reproducible and resistant to silent dependency swaps.

  • Pass
    Actively maintainedrecent commits

    Unmaintained servers don't receive security fixes.

  • Pass
    Repository not archivedguardactive

    Archived repositories will never be patched.

  • Pass
    Declares a licenseMIT

    A clear license is required for legal enterprise use.

  • Pass
    Has a security policySECURITY.md present

    A SECURITY.md gives a private path to report vulnerabilities.

  • Pass
    Adoption & popularityestablished adoption

    A small, capped nudge from stars/downloads — widely-used servers get more eyes on bugs. It can never offset a real security failure.

  • Not checked
    No known-vulnerable dependenciesno lockfile found

    Runtime dependencies (parsed from the lockfile) are scanned against OSV.dev for published CVEs. Advisory: flagged dependencies lower the score but don't hard-cap it, since transitive reachability is unproven.

  • Not checked
    Signed releasesnot evaluated

    Signed releases let consumers verify artifacts weren't tampered with.

  • N/A
    No install/post-install scriptsguardno published package

    install hooks run arbitrary code on every consumer at install time.

  • N/A
    Package name not typosquattingguardno published package

    Names mimicking popular packages are a common malware delivery vector.

  • N/A
    Published with provenanceno published package

    Build provenance attests the artifact was built from the claimed source by CI.

  • N/A
    Established maintainerno published package

    Brand-new / single anonymous maintainers raise takeover and malware risk.

Transport & Trust Model

  • Warn
    Execution Sandboxingruns natively (no container image)

    A container/sandbox image limits blast radius; a server that runs natively has full host access.

    Fix: Ship a Dockerfile/Containerfile (or document a sandboxed run) so the server runs isolated.

  • Pass
    Network Exposureno bind-all detected

    Binding 0.0.0.0 or exposing debug inspectors widens the attack surface.

  • N/A
    Transport Encryption (TLS)guardno remote endpoints

    Plaintext HTTP exposes traffic and bearer tokens to interception.

  • N/A
    IAM / Authentication Scopingno remote endpoints

    OAuth 2.1 / Protected Resource Metadata gates who can invoke tools.

  • N/A
    Live Endpoint Reachablenot dynamically scanned

    A dynamic scan connected to the declared remote endpoint and it responded — verified live, not a dead URL.

  • N/A
    Authentication Enforced (live)not dynamically scanned

    If the server declares auth is required, it must actually reject anonymous clients. Serving tools to unauthenticated callers is a real exposure.

Tools (80)

tailscale_pingtailscale_get_acltailscale_get_keytailscale_netchecktailscale_list_keystailscale_create_keytailscale_delete_keytailscale_get_devicetailscale_update_acltailscale_update_keytailscale_get_servicetailscale_preview_acltailscale_tool_groupstailscale_list_devicestailscale_local_statustailscale_local_whoamitailscale_validate_acltailscale_delete_devicetailscale_expire_devicetailscale_get_audit_logtailscale_get_oauth_apptailscale_get_split_dnstailscale_list_servicestailscale_local_versiontailscale_rename_devicetailscale_set_device_iptailscale_set_split_dnstailscale_delete_servicetailscale_update_servicetailscale_diff_acl_accesstailscale_get_nameserverstailscale_get_user_invitetailscale_list_oauth_appstailscale_set_device_tagstailscale_set_nameserverstailscale_authorize_devicetailscale_create_oauth_apptailscale_delete_oauth_apptailscale_get_search_pathstailscale_set_search_pathstailscale_update_split_dnstailscale_get_device_invitetailscale_get_device_routestailscale_list_user_invitestailscale_set_device_routestailscale_update_device_keytailscale_create_user_invitetailscale_deauthorize_devicetailscale_delete_user_invitetailscale_list_service_hoststailscale_local_service_listtailscale_resend_user_invitetailscale_get_dns_preferencestailscale_list_device_invitestailscale_set_dns_preferencestailscale_accept_device_invitetailscale_create_device_invitetailscale_delete_device_invitetailscale_resend_device_invitetailscale_get_dns_configurationtailscale_get_log_stream_configtailscale_get_log_stream_statustailscale_get_network_flow_logstailscale_set_dns_configurationtailscale_set_log_stream_configtailscale_create_aws_external_idtailscale_set_devices_authorizedtailscale_get_posture_integrationtailscale_list_log_stream_configstailscale_delete_log_stream_configtailscale_list_posture_integrationstailscale_validate_aws_trust_policytailscale_create_posture_integrationtailscale_delete_posture_integrationtailscale_update_posture_integrationtailscale_get_service_device_approvaltailscale_set_device_posture_attributetailscale_get_device_posture_attributestailscale_batch_update_posture_attributestailscale_delete_device_posture_attribute
YawLabs/tailscale-mcp vmain@b9c370d — 85/100 · Canopii Trust Index