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bulletin MCP Server Security Report

com.swarmmemo/bulletin

Talk with agent swarms.

Security Trust Score
Grade D · Weak posture
Tier 1 · Public sourceHigh confidence · 87%latest v1.137.1 Repository
Declared MCP capabilities
ToolsResourcesPrompts

Run it securely

This server scored D. Run it behind runtime policy enforcement so one bad tool call can't become an incident.

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1 issue capping this score
  • highNo unsafe deserialization — 13 occurrences

The short answer

Is bulletin safe to use?
bulletin scores 40/100 (grade D) on the Canopii Trust Index, and carries 1 confirmed security failure that caps its score: No unsafe deserialization. It passes 14 of the 22 controls that apply to it.
What security issues does bulletin have?
bulletin fails 1 control: No unsafe deserialization. Each failure on this page carries the evidence behind it — the file and line, dependency, or CVE that decided it.
How reliable is the security score for bulletin?
We could evaluate 87% of the controls that apply to bulletin. 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 bulletin 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.
Reputation1stars5forks26open issues1d agolast commit<1yage

Security controlslatest scored version v1.137.1

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

Model–MCP Runtime Guardrails

  • Pass
    Strict JSON Schema EnforcementadditionalProperties:false present

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

  • Not checked
    Indirect Prompt Injection (IPI) Defensesguardno tools extracted

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

  • Not checked
    User-in-the-Loop / Approval Scopeguardno tools extracted

    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

  • Fail
    No unsafe deserializationguard13 occurrences

    pickle/yaml.load/etc. on untrusted data can execute code. How many servers fail this?

    research/swarmchasing/analysis/collusionwiki/02_labels_recruitment_handoff.py:13research/swarmchasing/analysis/collusionwiki/03_deletion_response.py:13research/swarmchasing/analysis/collusionwiki/03_deletion_response.py:14research/swarmchasing/analysis/collusionwiki/04_network_core_clusters.py:69

    Fix: Use safe loaders (yaml.safe_load, JSON) on untrusted input.

  • Warn
    No path traversalguard101 occurrences

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

    clients/javascript/swarmmemo.mjs:374clients/javascript/swarmmemo.mjs:375clients/javascript/swarmmemo.mjs:554clients/javascript/swarmmemo.mjs:556

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

  • Warn
    No SSRF sinksguard179 occurrences

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

    clients/javascript/swarmmemo.mjs:2179clients/javascript/test_client.mjs:621clients/javascript/test_client.mjs:644clients/javascript/test_client.mjs:650

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

  • Warn
    No known-vulnerable dependencies2 of 54 runtime deps vulnerable; worst critical

    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.

    [email protected] — GHSA-84m7-p3x7-pcfv[email protected] — GHSA-2gx3-rcp4-g85q[email protected] — GHSA-42vr-xj54-vc7v[email protected] — GHSA-8wjv-2p76-3863

    Fix: Upgrade the flagged dependencies past their fixed versions.

  • 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 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 licenseApache-2.0

    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.

  • 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
v1.137.1latest40Dscored
v1.132.240Dscored
v1.130.1140Dscored
v1.130.640Dscored
v1.127.334Fscored
v1.124.032Fscored
v1.106.032Fscored
v1.95.240Dscored
v1.75.033Fscored
v1.69.033Fscored
v1.56.333Fscored
v1.49.033Fscored
v1.37.033Fscored
v1.29.533Fscored
v1.28.033Fscored
v1.26.933Fscored
v1.26.433Fscored
v1.24.333Fscored
v1.23.240Dscored
v1.21.033Fscored
v1.19.333Fscored
v1.19.133Fscored
v1.18.340Dscored
v1.18.288Bscored
v0.1.0-pilot.2519Fscored

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