io.github.cdeust/hypermnesia-mcp

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  unscannable25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  No tool descriptions, server instructions, prompts, or resources were fetched; nothing to scan for injection.

• Supply chain

  pass25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  Python build script has no build-time network/exec; repository linkage verified

• Credential hygiene

  pass15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  Reads secrets from the environment (e.g. _pipeline/run_test.py) — the recommended intake shape. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  warn15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  has both shell/exec and network egress — capable of download-and-run, though no such path was observed (benchmarks/_repro.py: subprocess.* call; mcp_server/handlers/validate_memory.py: outbound HTTP/socket call). has both shell/exec and destructive filesystem writes (benchmarks/_repro.py: subprocess.* call; benchmarks/active_forgetting/run_benchmark.py: open(…, 'w'/'a'/'x') write-mode file access). discloses shell/exec capability: 20 files (benchmarks/_repro.py, benchmarks/decision_ids/run_bench.py, benchmarks/energy/measurement.py, +17 more) discloses dynamic code execution: benchmarks/decision_ids/run_bench.py: uses eval()/exec() discloses dynamic code execution: benchmarks/reranker_matrix/handler_probe.py: uses eval()/exec() discloses broad/destructive filesystem access: 13 files (benchmarks/active_forgetting/run_benchmark.py, benchmarks/beam/ablation.py, benchmarks/beam/run_benchmark.py, +10 more) Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  fail10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  vs prior 4.19.1 (minor bump): new capability primitive(s) in source: child_process, fs-write, http-client, subprocess; new hardcoded outbound host/BCC destination(s): download.pytorch.org, example.invalid, github.com, huggingface.co, schemas.openxmlformats.org, www.python.org.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  manifest/source references tracking behavior — disclosure