OCPBUGS-113759: block GraphQL introspection over websocket - #17130
OCPBUGS-113759: block GraphQL introspection over websocket#17130emmahone wants to merge 1 commit into
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@emmahone: This pull request references Jira Issue OCPBUGS-113759, which is invalid:
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WalkthroughThe change adds a GraphQL subscription wrapper that rejects standalone introspection fields, preserves allowed operations, and delegates them to the wrapped subscriber. The server applies this wrapper when constructing the GraphQL handler. ChangesGraphQL introspection blocking
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The change blocks websocket introspection, but the current implementation can also reject legitimate queries that merely contain "__schema" in a string or comment. The matching should be limited to selected GraphQL fields before merge. Sequence Diagram(s)sequenceDiagram
participant GraphQLClient
participant GraphQLHandler
participant introspectionBlocker
participant SchemaSubscriber
GraphQLClient->>GraphQLHandler: Start subscription
GraphQLHandler->>introspectionBlocker: Subscribe(document, operationName, variables)
alt Introspection field detected
introspectionBlocker-->>GraphQLHandler: Return error
GraphQLHandler-->>GraphQLClient: Reject subscription
else Allowed operation
introspectionBlocker->>SchemaSubscriber: Subscribe(document, operationName, variables)
SchemaSubscriber-->>GraphQLClient: Return subscription channel
end
🚥 Pre-merge checks | ✅ 14 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (14 passed)
Full details: Description checkExplanation The description provides the problem, root cause, solution, affected versions, test cases, manual verification steps, and additional context. The browser conformance and test setup sections are not explicitly completed, but these omissions are non-critical for this backend-only change. Full details: Stable And Deterministic Test NamesExplanation The pull request adds a standard Go test with fixed Full details: Test Structure And QualityExplanation PASS: The changed test is a standard Go Full details: Microshift Test CompatibilityExplanation The pull request adds a standard Go unit test, Full details: Single Node Openshift (Sno) Test CompatibilityExplanation The check is not applicable. The pull request adds a standard Go unit test, Full details: Topology-Aware Scheduling CompatibilityExplanation The check is not applicable. The PR changes only GraphQL code and Full details: Ote Binary Stdout ContractExplanation The pull request adds no stdout writes in process-level code. The new Full details: Ipv6 And Disconnected Network Test CompatibilityExplanation PASS: The pull request adds a standard-library Go unit test, Full details: No-Weak-CryptoExplanation The pull request introduces no weak cryptography. The changed code uses Full details: Container-PrivilegesExplanation PASS: The commit changes only Go source and test files. It adds no container or Kubernetes manifest fields for privileged mode, hostPID, hostNetwork, hostIPC, SYS_ADMIN, allowPrivilegeEscalation, or root execution. The changed server code only wraps a GraphQL handler. Full details: No-Sensitive-Data-In-LogsExplanation PASS: The pull request adds no runtime logging. ✨ Finishing Touches🧪 Generate unit tests (beta)
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: emmahone The full list of commands accepted by this bot can be found here. DetailsNeeds approval from an approver in each of these files:Approvers can indicate their approval by writing |
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@emmahone: This pull request references Jira Issue OCPBUGS-113759, which is invalid:
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Actionable comments posted: 1
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Inline comments:
In `@pkg/graphql/introspection.go`:
- Line 56: Update the introspection check around
introspectionFieldRE.MatchString so it parses or tokenizes the GraphQL document
and blocks only fields that actually select introspection names such as __schema
or __type. Preserve ordinary queries where those strings occur in comments or
StringValue arguments, and add regression coverage for both cases.
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pkg/graphql/introspection.gopkg/graphql/introspection_test.gopkg/server/server.go
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graphql.DisableIntrospection() only takes effect on the HTTP (Exec) path in graph-gophers/graphql-go v1.5.0. The console also serves /api/graphql over a graphql-ws websocket, whose Subscribe path executes queries with introspection enabled, so the schema can still be enumerated over the websocket even though it is blocked over plain HTTP. Wrap the schema with an introspection-blocking service on the websocket path so introspection queries (__schema/__type/_service) are rejected, matching the HTTP behavior. __typename remains allowed. This is already resolved on release-4.19 and release-4.20, which ship graphql-go v1.6.0 (the option was reworked so the Subscribe path defaults to introspection disabled), and the GraphQL endpoint is removed entirely from main. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Thanks @coderabbitai. Addressed in the latest (squashed) revision. The raw-text regex is replaced with Regression tests added for the false-positive cases:
(plus the existing blocked cases: |
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@emmahone: This pull request references Jira Issue OCPBUGS-113759, which is invalid:
Comment DetailsIn response to this:
Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository. |
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@emmahone: This pull request references Jira Issue OCPBUGS-113759, which is invalid:
Comment DetailsIn response to this:
Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository. |
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/jira refresh |
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@emmahone: This pull request references Jira Issue OCPBUGS-113759, which is valid. The bug has been moved to the POST state. 9 validation(s) were run on this bug
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CONSOLE Features and Fixes:
OCPBUGS-113759: block GraphQL introspection over the console's
/api/graphqlwebsocket (graphql-ws) transport, closing the gap left by OCPBUGS-43671 / #14639.Solution description
Problem. OCPBUGS-43671 (#14639) added
graphql.DisableIntrospection()to disable introspection on the console GraphQL endpoint. In graph-gophers/graphql-go v1.5.0 (used by release-4.18) that option only affects the HTTPSchema.Execpath. The same/api/graphqlendpoint is also served over a graphql-ws websocket, which runs operations throughSchema.Subscribe; that path builds its request without the introspection flag, so introspection stays enabled. A client can enumerate the schema by sending the introspection query over the websocket instead of HTTP:{"type":"start","id":"1","payload":{"query":"query { __schema { queryType { name } } }"}}Fix. Wrap the schema in an
introspectionBlocker(pkg/graphql/introspection.go) that implements the graphql-ws service interface. It rejects any document selecting an introspection meta-field (__schema,__type,_service) before delegating toSchema.Subscribe, and continues to allow__typename(required for unions/interfaces and injected by Apollo Client). The HTTP path is unchanged; only the websocket service argument is swapped inpkg/server/server.go.Affected versions.
Subscribe(websocket) path defaults to introspection disabled. No change needed.Reviewers and assignees:
Test cases:
Unit test
TestIntrospectionBlockerSubscribe(pkg/graphql/introspection_test.go):__schema,__type, aliased__schema, minified__schema,_service.__typename, an ordinary query, and a subscription.Manual verification: with a console built from this branch, sending the introspection query over the websocket now returns an error instead of the schema; sending it over plain HTTP is unchanged (already blocked).
Additional info:
Root cause is in graph-gophers/graphql-go v1.5.0:
Schema.Execsets the introspection flag on its request butSchema.subscribedoes not, so introspection is only suppressed on the HTTP path. This guard is only needed on branches pinned to v1.5.0.Screen shots / gifs / design review:
N/A — backend-only change, no UI.
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Summary by CodeRabbit
__typename, regular queries, and non-introspection subscriptions continue to work as expected.