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fix(auth): limit repeated authorization requests - #2094
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WalkthroughThe API applies throttling to the OIDC authorize and callback routes. OIDC parameter validation enforces input types and length limits. OIDC state generation and validation track active nonces and release them on expiration or failure. ChangesOIDC Protections
Priority: Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Merge Risk:
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|---|---|---|
| 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 5… |
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| Description Check | ✅ Passed | Check skipped - CodeRabbit’s high-level summary is enabled. |
| Title check | ✅ Passed | The title clearly describes the main change: limiting repeated authorization requests. This matches the OIDC throttling and pending-state capacity changes. |
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A rabbit checks each state at dawn
And counts the nonces one by one
The routes now slow their rapid pace
Bad inputs find a guarded place
The cache lets go when states are done
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| private getStateBucket(providerId: string, redirectUri?: string): string { | ||
| return `${providerId}:${redirectUri ?? ''}`; |
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This bucket is shared by every user of the same OIDC provider and callback URI, rather than by the requester. Because the public authorize route only rate-limits each tracker, a client can leave 32 normal authorization redirects unfinished within the ten-minute state TTL; generateSecureState then throws for all unrelated users trying to sign in through that provider and callback, which the REST controller returns as a 400. Include a requester-specific key in this limit (or remove the shared bucket cap) so one client cannot deny SSO to others.
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #2094 +/- ##
==========================================
+ Coverage 53.48% 53.54% +0.06%
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Files 1046 1046
Lines 73172 73308 +136
Branches 8551 8579 +28
==========================================
+ Hits 39137 39256 +119
- Misses 33907 33924 +17
Partials 128 128 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Actionable comments posted: 1
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Inline comments:
Review comments at
@api/src/unraid-api/graph/resolvers/sso/session/oidc-state.service.ts:
- Around line 68-69: Update the capacity check in OidcStateService so
pending-state limits are isolated by a trusted provider or client scope rather
than shared across all requests. Retain a separate aggregate safety cap sized
for expected concurrent authorization load, and do not use caller-controlled
clientState as the scope key.
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📒 Files selected for processing (6)
api/src/unraid-api/app/app.module.tsapi/src/unraid-api/auth/fastify-throttler.guard.tsapi/src/unraid-api/graph/resolvers/sso/session/oidc-state.service.tsapi/src/unraid-api/graph/resolvers/sso/utils/oidc-request-handler.util.tsapi/src/unraid-api/rest/rest.controller.tsapi/src/unraid-api/rest/rest.module.ts
💤 Files with no reviewable changes (1)
- api/src/unraid-api/app/app.module.ts
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🤖 I have created a release *beep* *boop* --- ## [4.37.8](v4.37.7...v4.37.8) (2026-10-26) ### Bug Fixes * **api:** preserve partial results and accurate notification counts ([#2123](#2123)) ([3371fd4](3371fd4)) * **auth:** limit repeated authorization requests ([#2094](#2094)) ([e160a4e](e160a4e)) * **auth:** prevent custom permission checks racing policy refresh ([#2125](#2125)) ([05ba1bf](05ba1bf)) * **graphql:** bound request size and expanded selections ([#2121](#2121)) ([0c60d9d](0c60d9d)) * **graphql:** filter schema metadata requests ([#2095](#2095)) ([dcd396e](dcd396e)) * **settings:** omit internal provider values ([#2096](#2096)) ([30e8d6a](30e8d6a)) * **updates:** embed internal OS checks on Tools page ([#2020](#2020)) ([b95ae92](b95ae92)) * **web:** restore right-side banner fade on legacy headers ([#2126](#2126)) ([da7b87d](da7b87d)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Eli Bosley <[email protected]>
Adds bounded handling for repeated authorization requests and callbacks.
Related to OS-982.
Depends on #2098 for shared dependency resolutions.
Verification: lint, type-check, build.