Mnemosyne MCP
Provides persistent knowledge graph memory for AI agents with local semantic search using Neo4j and ONNX embeddings, enabling offline operation with zero API costs.
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
EMBEDDING_PROVIDERChoose 'auto', 'local', or 'openai'EMBEDDING_RATE_LIMIT_INTERVALEMBEDDING_RATE_LIMIT_TOKENSLOCAL_EMBEDDING_MODELSelect which BGE model to useMEMORY_FILE_PATHMEMORY_STORAGE_TYPEMNEMOSYNE_AUTO_CLEANUPMNEMOSYNE_FORCE_DATABASEMNEMOSYNE_ISOLATION_LEVELMNEMOSYNE_PROJECT_NAMEMNEMOSYNE_PROJECT_ROOTMNEMOSYNE_RETENTION_DAYSMOCK_EMBEDDINGSNEO4J_DATABASE"": "neo4j",NEO4J_PASSWORDmemento123NEO4J_SIMILARITY_FUNCTIONNEO4J_URIbolt://127.0.0.1:7687NEO4J_USERNAME"": "neo4j",NEO4J_VECTOR_DIMENSIONSNEO4J_VECTOR_INDEXOPENAI_API_KEYUses OpenAI if is presentOPENAI_EMBEDDING_MODELtext-embedding-3-smallTEST_INTEGRATIONTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
20/20 tools missing one or more hints — create_entities (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_relations (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); add_observations (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +17 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool test coverage
15/20 tools referenced in tests (75%)
Write tests that reference each tool by name so every tool has at least one test.
Secrets not logged
5 secret values sent to console.log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 15 high severity in production deps — @modelcontextprotocol/sdk@1.11.0 (high), @modelcontextprotocol/sdk@1.11.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
2 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
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