Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.YonasValentin/mcp-memory-graph

A memory server for Claude Code and any other MCP client.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 6dd8aea43a02, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    scripts/smoke-mcp.mjs, line 116 for (const f of [tmpDb, tmpDb + '-wal', tmpDb + '-shm']) { try { fs.unlinkSync(f); } catch { /* ignore */ } }

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    scripts/battle/verify-load.mjs, line 91 const res = await fetch(`${BASE}/health`);

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .claude/skills/mcp-memory/references/rest-and-ops.md, line 91 - **Token rotation (~90d / on exposure):** `openssl rand -hex 32` → update `MCP_AUTH_TOKEN` in `.env` → `docker compose up -d --force-recreate` → verify → update clients. Single-to

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    benchmarks/results/locomo-session-recall.json, line 1 {

  • OBFUSCATION_FILE_CAP_REACHED Note

    The 400 file cap was reached before every file was read.

    benchmarks/results/locomo-session-recall.json, line 1 {

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

    scripts/smoke-mcp.mjs, line 116

    for (const f of [tmpDb, tmpDb + '-wal', tmpDb + '-shm']) { try { fs.unlinkSync(f); } catch { /* ignore */ } }

    scripts/smoke-mcp.mjs, line 117

    try { fs.rmSync(tmpKeyDir, { recursive: true, force: true }); } catch { /* ignore */ }

    scripts/battle/verify-nli.mjs, line 274

    try { fs.unlinkSync(dbPath); fs.rmSync(dbPath + '-wal', { force: true }); fs.rmSync(dbPath + '-shm', { force: true }); } catch {}

  • 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

    scripts/battle/verify-load.mjs, line 91

    const res = await fetch(`${BASE}/health`);

    scripts/battle/verify-load.mjs, line 110

    const res = await fetch(`${BASE}${path}`, {

    scripts/battle/verify-rbac.mjs, line 84

    try { const r = await fetch(`${BASE}/health`); if (r.ok) return true; } catch { /* not up */ }

    Show more

    scripts/battle/verify-rbac.mjs, line 91

    fetch(`${BASE}${urlPath}`, token ? { headers: { authorization: `Bearer ${token}` } } : undefined);

    scripts/battle/verify-remote-init.mjs, line 53

    try { if ((await fetch(`http://127.0.0.1:${PORT}/health`)).ok) return true; } catch { /* not up */ }

    scripts/battle/verify-remote-init.mjs, line 99

    await fetch(`http://127.0.0.1:${PORT}/ready`).catch(() => {}); // pre-warm embedder

    scripts/battle/verify-remote-init.mjs, line 119

    const stats = await (await fetch(`http://127.0.0.1:${PORT}/api/stats`, { headers: { authorization: `Bearer ${TOKEN}` } })).json();

    scripts/battle/verify-ui-e2e.mjs, line 57

    try { if ((await fetch(`${BASE}/health`)).ok) return true; } catch { /* not up */ }

    scripts/battle/verify-ui-e2e.mjs, line 64

    const r = await fetch(`${BASE}/api/stats`, { headers: { authorization: `Bearer ${TOKEN}` } });

    scripts/battle/verify-ui-e2e.mjs, line 83

    await fetch(`${BASE}/ready`).catch(() => {});

    scripts/battle/verify-web.mjs, line 6

    * seeded temp DB (real embedder, real handleStore), then curl every REST

    Dockerfile, line 58

    CMD node -e "fetch('http://localhost:3100/health').then(r=>{if(!r.ok)process.exit(1)}).catch(()=>process.exit(1))"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .claude/skills/mcp-memory/references/rest-and-ops.md, line 59

    - **Env:** `MCP_AUTH_TOKEN`, `MCP_AUTH_OPTIONAL`, `MCP_METRICS_ENABLED=1`, `MCP_MEMORY_DB_PATH=/data/memory.db`, `MCP_MEMORY_DIMENSIONS` (must match persisted `embedding_dim`), `MC

    .claude/skills/mcp-memory/references/rest-and-ops.md, line 91

    - **Token rotation (~90d / on exposure):** `openssl rand -hex 32` → update `MCP_AUTH_TOKEN` in `.env` → `docker compose up -d --force-recreate` → verify → update clients. Single-to

    .gitignore, line 10

    # Secrets

    Show more

    .gitignore, line 11

    .env

    README.md, line 491

    export MEMORY_MCP_TOKEN=<the server token> # in your shell or .env

    docs/RUNBOOK.md, line 225

    2. Update `MCP_AUTH_TOKEN` in `/opt/stacks/mcp-memory-graph/.env` on the deploy 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. the file cap was reached before every file was read.

    OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

    benchmarks/results/locomo-session-recall.json, line 1

    {

    src/__tests__/vault/writer.test.ts, line 1

    /**

  • 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 6dd8aea43a02. 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. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: 6dd8aea43a022f380b9764cf5e468171360802f1

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