fix(graphql): filter schema metadata requests by SimonFair · Pull Request #2095 · unraid/api

SimonFair · 2026-09-29T11:07:42Z

Updates GraphQL schema-request handling for normal API operations.\n\nRelated to OS-900.\nVerification: lint, type-check, build.

coderabbitai · 2026-09-29T11:07:58Z

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Walkthrough

The introspection plugin now detects root-level __schema and __type fields, including fields reached through fragments. When Sandbox is disabled, it returns a 400 response with INTROSPECTION_DISABLED.

Changes

Introspection blocking

Layer / File(s)	Summary
Introspection field detection `api/src/unraid-api/graph/introspection-plugin.ts`	Helpers detect root-level `__schema` and `__type` fields through inline and named fragments. They also select the relevant operation and construct the blocked-introspection error body.
Plugin response handling `api/src/unraid-api/graph/introspection-plugin.ts`	The plugin blocks matching parsed operations when Sandbox is disabled. If Apollo has no operation or document, it parses the query and checks the named or sole operation. Malformed queries are ignored.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~12 minutes

Change: Bug fix

Merge Risk: 🟡 Moderate · up to c6f3b

Root __type queries are now rejected with a 400 when Sandbox is disabled, while an existing test expects them to be allowed. Decide whether blocking __type is intended. Then either remove it from the blocked set or update the spec, and confirm no first-party client sends root __type queries, before merging.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to c6f3b

The new gate blocks more schema-metadata requests, but its handling of repeated GraphQL fragments may substantially increase work per request. The practical impact depends on request limits that have not been established.

Retained concerns

Medium · security · inferred: Repeated acyclic fragment spreads can amplify CPU work in the new Sandbox-disabled introspection gate before a request is executed.

Security review details

Security Blast Radius

inferred — A client able to submit GraphQL operations can supply the fragment structure inspected by the new gate. Excess traversal work would consume resources in the shared GraphQL API; effective upstream limits are unknown.

Security Findings and Attack Paths

inferred — A compact chain of fragments that each spread the next fragment more than once can cause repeated expansion in the Sandbox-disabled gate even when it contains no blocked field. Cycle tracking and early exit on a blocked field do not bound that case.

Trust Boundaries and Controls

observed — The gate reads the Sandbox setting before blocking introspection and uses the parsed operation for the primary Apollo path. The shown GraphQL configuration has no explicit query-complexity rule.

Hardening Proposals

proposed — Bound or memoize fragment inspection per root context, and verify ingress complexity limits and the effective introspection policy on each GraphQL transport.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: filtering GraphQL schema metadata requests.

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_{A rabbit checks the query's trail,
Finds schema fields behind a veil.
With Sandbox off, the gates are closed,
A clear response is then composed.
I hop away; the checks are neat!}

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Actionable comments posted: 1

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Inline comments:
Review comments at @api/src/unraid-api/graph/introspection-plugin.ts:
- Line 5: Remove __type from BLOCKED_INTROSPECTION_FIELDS in the introspection
blocking logic, preserving the existing policy that root-level __type queries
remain allowed when Sandbox is disabled.

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Configuration used: Repository UI

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Run ID: 5fd54378-b5ab-43d0-8f65-5791eebde526

📥 Commits

Reviewing files that changed from the base of the PR and between d4d9733 and c6f3b42.

📒 Files selected for processing (1)

api/src/unraid-api/graph/introspection-plugin.ts

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chatgpt-codex-connector · 2026-09-29T11:10:58Z

+import type { DocumentNode, OperationDefinitionNode, SelectionSetNode } from 'graphql';
+import { Kind, parse } from 'graphql';
+
+const BLOCKED_INTROSPECTION_FIELDS = new Set(['__schema', '__type']);


Update the disabled-sandbox __type test contract

Adding __type to the blocked set makes this request return status 400 with INTROSPECTION_DISABLED whenever the sandbox is disabled, but api/src/unraid-api/graph/introspection-plugin.spec.ts:130-139 still asserts that the exact request succeeds with status 200 and no body. Consequently, the API Vitest suite fails after this commit; update that test to the new intended behavior (or keep __type allowed if that contract must remain).

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chatgpt-codex-connector · 2026-09-29T11:10:58Z

+                            response.body = blockedIntrospectionBody();
+                            response.http.status = 400;


Guard the fallback HTTP status update

This fallback path now dereferences response.http unconditionally, whereas the prior implementation guarded it. The existing no-HTTP response case in api/src/unraid-api/graph/introspection-plugin.spec.ts:201-231 invokes this path for a blocked query, so it now throws a TypeError instead of returning the intended GraphQL error and causes the API test suite to fail.

Useful? React with 👍 / 👎.

codecov · 2026-09-29T11:53:24Z

Codecov Report

❌ Patch coverage is 67.34694% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.36%. Comparing base (d4d9733) to head (d1122f1).

Files with missing lines	Patch %	Lines
api/src/unraid-api/graph/introspection-plugin.ts	67.34%	32 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2095      +/-   ##
==========================================
- Coverage   53.38%   53.36%   -0.02%     
==========================================
  Files        1044     1044              
  Lines       72705    72777      +72     
  Branches     8399     8414      +15     
==========================================
+ Hits        38811    38839      +28     
- Misses      33767    33811      +44     
  Partials      127      127

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github-actions · 2026-09-29T11:54:08Z

This plugin has been deployed to Cloudflare R2 and is available for testing.
Download it at this URL:

https://preview.dl.unraid.net/unraid-api/tag/PR2095/dynamix.unraid.net.plg

OS-900

fix(graphql): filter schema metadata requests

c6f3b42

coderabbitai Bot requested changes Sep 29, 2026

View reviewed changes

Comment thread api/src/unraid-api/graph/introspection-plugin.ts Outdated

chatgpt-codex-connector Bot reviewed Sep 29, 2026

View reviewed changes

fix(graphql): allow type metadata queries

e0b12a7

fix(graphql): guard response status update

d1122f1

OS-900

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fix(graphql): filter schema metadata requests - #2095

fix(graphql): filter schema metadata requests#2095
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		response.body = blockedIntrospectionBody();
		response.http.status = 400;

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