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mcp MCP Server Security Report

ai.pubfi/mcp

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Security Trust Score
Grade B · Moderate posture
Tier 1 · Public sourceHigh confidence · 98%latest v0.2.84 Repository
Declared MCP capabilities
ResourcesPrompts

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The short answer

Is mcp safe to use?
mcp scores 86/100 (grade B) on the Canopii Trust Index — good, minor gaps. It passes 15 of the 23 security controls that apply to it, with no confirmed security failures.
How reliable is the security score for mcp?
We could evaluate 98% of the controls that apply to mcp. Scores are deterministic — the same source always produces the same score — and a partially-scannable server cannot present a high one, because confidence caps the result. The scanner is open source, so this score can be reproduced independently.
How was mcp scored?
Its published source was scanned against a fixed catalog of weighted security controls covering code safety, committed secrets, dependency vulnerabilities, tool-description integrity, authentication and transport, and maintenance. A confirmed flaw caps the score outright regardless of what else passes. The full rubric is published.
Reputation0stars2forks0open issues4d agolast commit<1yage

Security controlslatest scored version v0.2.84

Each control is evaluated deterministically with evidence. The score is 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
    Tool Definition Integrityguardtool definitions stable; no risky changes in version history

    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.

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

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

Application Security Checks

  • Warn
    No path traversalguard15 occurrences (build/test paths only)

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

    examples/agents/pubfi-route-tools-mcp/endpoint-policy.ts:81examples/agents/pubfi-route-tools-mcp/smoke_pubfi_route_tools_mcp.ts:389examples/agents/x402-base-mainnet/signed-artifacts.mjs:76examples/agents/x402-base-sepolia/payment-policy.mjs:37

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

  • Warn
    No SSRF sinksguard7 occurrences (build/test paths only)

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

    examples/agents/pubfi-route-tools-mcp/server.ts:97examples/agents/x402-base-mainnet/http-paid.mjs:105examples/agents/x402-base-mainnet/http-paid.mjs:138examples/agents/x402-base-mainnet/signed-artifacts.mjs:81

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

  • Warn
    No known-vulnerable dependencies1 of 110 runtime deps vulnerable; worst high

    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.

    @modelcontextprotocol/[email protected] — GHSA-6qxp-vccf-f47h

    Fix: Upgrade the flagged dependencies past their fixed versions.

  • Warn
    Declares a licenseno recognized license

    A clear license is required for legal enterprise use.

    Fix: Add a recognized SPDX license (MIT, Apache-2.0, …).

  • Warn
    Has a security policyno security policy

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

    Fix: Add SECURITY.md with a disclosure contact and process.

  • Warn
    Adoption & popularitylimited adoption

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

    Fix: Adoption grows naturally with real-world use; this never gates the score.

  • Pass
    No command-injection sinksguardno sinks found

    Untrusted tool input reaching a shell yields remote code execution.

  • Pass
    No dynamic code executionguardno sinks found

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

  • 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

  • Pass
    Transport Encryption (TLS)guardall remotes use HTTPS

    Plaintext HTTP exposes traffic and bearer tokens to interception.

  • Pass
    IAM / Authentication ScopingOAuth / PRM handling detected

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

  • Pass
    Execution Sandboxingcontainerized

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

  • Pass
    Network Exposureno bind-all detected

    Binding 0.0.0.0 or exposing debug inspectors widens the attack surface.

  • 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.

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Versions

VersionScoreStatus
v0.2.84latest86Bscored
v0.2.8387Bscored
v0.2.8187Bscored
v0.2.8087Bscored
v0.2.7987Bscored
v0.2.7787Bscored
v0.2.7587Bscored
v0.2.6887Bscored
v0.2.6687Bscored
v0.2.6387Bscored
v0.2.5887Bscored
v0.2.5587Bscored
v0.2.4987Bscored
v0.2.4787Bscored
v0.2.4387Bscored
v0.2.3887Bscored
v0.2.3487Bscored
v0.2.3287Bscored
v0.2.3187Bscored
v0.2.2387Bscored
v0.2.2287Bscored
v0.2.1887Bscored
v0.2.1487Bscored
v0.2.1285Bscored
v0.2.1087Bscored
v0.2.787Bscored
v0.2.587Bscored
v0.2.487Bscored
v0.2.385Bscored
v0.1.9815Fscored
v0.1.9685Bscored
v0.1.8515Fscored
v0.1.7987Bscored
v0.1.7887Bscored
v0.1.7687Bscored
v0.1.7387Bscored
v0.1.7085Bscored
v0.1.6684Bscored
v0.1.6584Bscored
v0.1.6387Bscored

Wondering how this compares? The MCP Security Index tracks grade distribution, committed secrets, and missing authentication across the whole ecosystem, refreshed monthly.