nhost-security

Nhost / Hasura Security Auditor

Audit any Hasura instance (or Nhost project) for permissive role permissions, missing row-level scoping, and public GraphQL leaks. Active probe confirms each leak by sending an anonymous GraphQL query and showing what comes back.

▶ Run it without installing anything → apify.com/renzomacar/nhost-security-auditor (paste Hasura endpoint + admin secret, get HTML report)

⚡ Want me to run it for you and send back a written report? $99, 24h delivery → https://perufitlife.github.io/supabase-security-skill/ (one landing covers all five — Supabase, PocketBase, Appwrite, Hasura, Firebase)

Why this exists

Hasura's permission model is powerful but easy to leave too open. The patterns I see most often:

• anonymous role with open SELECT permission — any unauthenticated request can query the table. Often a leftover from local dev.
• user role with empty filter {} — any signed-up user can read/update/delete every row, ignoring ownership. Should usually be { user_id: { _eq: "X-Hasura-User-Id" } }.
• SELECT permission with all columns — exposes sensitive columns (password_hash, internal_notes) the role doesn't actually need.
• Public schema introspection — anyone can map your entire data model + permission structure without auth.

Install + run

HASURA_ENDPOINT=https://my.hasura.app \
HASURA_ADMIN_SECRET=$ADMIN_SECRET \
npx nhost-security --html report.html

For Nhost projects the endpoint is https://<subdomain>.hasura.<region>.nhost.run.

What it checks

#	Check	Severity
1	anonymous role has open SELECT permission	CRITICAL
2	anonymous role has INSERT/UPDATE/DELETE permission	CRITICAL
3	user role has SELECT/UPDATE/DELETE without row-level filter	HIGH
4	Permission exposes all columns (no allowlist)	MEDIUM
5	GraphQL introspection enabled for anonymous	MEDIUM

Active probe

For every suspect anonymous SELECT permission, the auditor sends an anonymous GraphQL query ({ <table>(limit: 1) { __typename } }) and reports confirmed: true if rows come back. For introspection, sends { __schema { queryType { name } } } and reports if anonymous can read the schema.

--no-probe disables the live fetch.

License + source

MIT. Open source: https://github.com/Perufitlife/nhost-security-skill

For Supabase, see https://github.com/Perufitlife/supabase-security-skill For PocketBase, see https://github.com/Perufitlife/pocketbase-security-skill For Appwrite, see https://github.com/Perufitlife/appwrite-security-skill