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opencaselaw MCP Server Security Report

jonashertner/opencaselaw

Open Swiss legal corpus + MCP server: 1M+ court decisions (1875–today), 21k laws, 10M-edge citation graph, 42 MCP tools. CC0 data, MIT code. Live at mcp.opencaselaw.ch

Security Trust Score
Grade A · Strong posture
Tier 1 · Public sourceHigh confidence · 90%latest vmain@37690bd Repository
Declared MCP capabilities
ResourcesPrompts

Run it securely

Host jonashertner/opencaselaw in a governed environment — SSO in front, every tool call attributed and audited.

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The short answer

Is opencaselaw safe to use?
opencaselaw scores 92/100 (grade A) on the Canopii Trust Index — strong posture. It passes 16 of the 21 security controls that apply to it, with no confirmed security failures.
How reliable is the security score for opencaselaw?
We could evaluate 90% of the controls that apply to opencaselaw. 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 opencaselaw 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.
Reputation55stars16forks18open issues38d agolast commit<1yage

Security controlslatest scored version vmain@37690bd

Each control is evaluated deterministically with evidence. The score is earned from passing controls; a failed guard caps it.

Model–MCP Runtime Guardrails

  • Pass
    Indirect Prompt Injection (IPI) Defensesguardno injection markers

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

  • Pass
    Strict JSON Schema EnforcementadditionalProperties:false present

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

  • 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 traversalguard2 occurrences

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

    agentic-research-desk-mvp/server.js:79agentic-research-desk-mvp/server.js:194

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

  • Warn
    No SSRF sinksguard10 occurrences

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

    agentic-research-desk-mvp/public/app.js:28agentic-research-desk-mvp/src/opencaselaw-client.js:117audit_source_urls.py:80backfill_bstger_urls.py:114

    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 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.

  • 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.

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Versions

VersionScoreStatus
vmain@6a9810987Bscored
vmain@5b85b5387Bscored
vmain@1670dc387Bscored
vmain@852319187Bscored
vmain@94b7bc587Bscored
vmain@b12c1ca87Bscored
vmain@89b046487Bscored
vmain@18ab19587Bscored
vmain@6c668bd87Bscored
vmain@dfeb2bb87Bscored
vmain@c107e8787Bscored
vmain@6b3f15187Bscored
vmain@eec92e087Bscored
vmain@e6eceb387Bscored
vmain@a28f4e287Bscored
vmain@c58bc8587Bscored
vmain@5b7314f87Bscored
vmain@77fda2387Bscored
vmain@4297f9387Bscored
vmain@0f8d0db87Bscored
vmain@ff7d35387Bscored
vmain@e8cc71490Ascored
vmain@0ee3edb92Ascored
vmain@e4a9f7792Ascored
vmain@b19cb4292Ascored
vmain@763d88592Ascored
vmain@851b63c92Ascored
vmain@5cf981892Ascored
vmain@4ec92ae92Ascored
vmain@907e6e292Ascored
vmain@17365ce92Ascored
vmain@55e88d492Ascored
vmain@576a1f292Ascored
vmain@46d8a5192Ascored
vmain@37df2d892Ascored
vmain@3ba97bb92Ascored
vmain@37690bdlatest92Ascored
vmain@ba9da2192Ascored
vmain@d652e5c92Ascored
vmain@af4b48992Ascored
vmain@8dba4ff92Ascored
vmain@95ba3cd92Ascored
vmain@1ee370292Ascored
vmain@b0031e291Ascored

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