fix(oauth-server): allow custom URI schemes in client redirect URIs #2298
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fadymak
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Dec 29, 2025
cemalkilic
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Jan 12, 2026
Resets the main branch (`master`) to have the same changeset as 2.184.0 but under 2.185.0. Original release please notes: ### Features * Add Sb-Forwarded-For header and IP-based rate limiting ([#2295](#2295)) ([e8f679b](e8f679b)) * allow amr claim to be array of strings or objects ([#2274](#2274)) ([607da43](607da43)) * Treat rate limit header value as comma-separated list ([#2282](#2282)) ([5f2e279](5f2e279)) ### Bug Fixes * check each type independently ([#2290](#2290)) ([d9de0af](d9de0af)) * fix the wrong error return value ([#1950](#1950)) ([e2dfb5d](e2dfb5d)) * **indexworker:** remove pg_trgm extension ([#2301](#2301)) ([c553b10](c553b10)) * **oauth-server:** allow custom URI schemes in client redirect URIs ([#2298](#2298)) ([ea72f57](ea72f57)) * tighten email validation rules ([#2304](#2304)) ([33bb372](33bb372)) --------- Co-authored-by: depthfirst-app[bot] <184448029+depthfirst-app[bot]@users.noreply.github.com>
cemalkilic
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Jan 12, 2026
🤖 I have created a release *beep* *boop* --- ## [2.185.0](v2.184.0...v2.185.0) (2026-01-12) ### Features * Add Sb-Forwarded-For header and IP-based rate limiting ([#2295](#2295)) ([e8f679b](e8f679b)) * allow amr claim to be array of strings or objects ([#2274](#2274)) ([607da43](607da43)) * reset main branch to 2.185.0 ([#2325](#2325)) ([b9d0500](b9d0500)) * Treat rate limit header value as comma-separated list ([#2282](#2282)) ([5f2e279](5f2e279)) ### Bug Fixes * additional provider and issuer checks ([#2326](#2326)) ([cb79a74](cb79a74)) * check each type independently ([#2290](#2290)) ([d9de0af](d9de0af)) * fix the wrong error return value ([#1950](#1950)) ([e2dfb5d](e2dfb5d)) * **indexworker:** remove pg_trgm extension ([#2301](#2301)) ([c553b10](c553b10)) * **oauth-server:** allow custom URI schemes in client redirect URIs ([#2298](#2298)) ([ea72f57](ea72f57)) * tighten email validation rules ([#2304](#2304)) ([33bb372](33bb372)) --- 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>
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Hi! I was actually trying to deploy a remote MCP server over streamable HTTP using Supabase Auth as the OAuth server, and ran into an issue that looks related. It seems custom URL schemes are being rejected: I initially thought this PR addressed that, but it looks like the change was reverted. Thanks a lot, really appreciate the work on this 🙏 |
@nitnizzie the revert is temporary. Expect it to be rolled out again in the coming weeks. |
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Problem
Fixes #2285
The OAuth 2.0 Client Registration endpoin was incorrectly rejecting custom URI schemes like
cursor://, ormyapp://, blocking native application integrations.Root Cause
The validation logic in
validateRedirectURI()was overly restrictive, only allowing HTTPS or HTTP (localhost). This contradicted with RFC 8252 (OAuth 2.0 for Native Apps) - recommends custom URI schemesSolution
Relaxed redirect URI validation
New Validation Rules
cursor://,myapp://,vscode://, etc.)localhost,127.0.0.1,::1)