nimblebrain
Self-hosted platform for MCP Apps and agent automations — tools, interactive UIs, scheduled runs, multi-agent delegation.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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NimbleBrainInc
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
happy-dom's `--disallow-code-generation-from-strings` is not sufficient for isolating untrusted JavaScript
hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard
Happy DOM ECMAScriptModuleCompiler: unsanitized export names are interpolated as executable code
Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies
Hono: app.mount() strips mount prefix using undecoded path, causing incorrect routing for percent-encoded paths
ALLOWED_ORIGINSComma-separated allowed CORS origins (for cookie-based auth)NB_BUILD_SHANB_CHAT_RATE_LIMITChat requests per minute per user (default: 20)NB_MCP_RATE_LIMITNB_TENANT_IDNB_TIMEZONEDefault IANA timezone for time-aware featuresNB_TOOL_RATE_LIMITTool calls per minute per user (default: 60)NB_VERSIONNB_WORK_DIRThe working directory is set via (see Environment Variables).PORTTool 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
14/14 tools missing one or more hints — list_apps (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_config (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); version (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +11 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.
Production dependencies are patched
0 critical, 1 high severity in production deps — hono@4.12.14 (high), hono@4.12.14 (low)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
3 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
Dependency freshness
3/31 production deps abandoned (no release in 2+ years): gray-matter@2023-07-12 (3.2y), ajv-formats@2024-03-30 (2.5y), @e965/xlsx@2024-07-19 (2.2y)
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