LibreChat/api/server/routes
Dustin Healy 054fa4bfa7
🥽 fix: Restrict MCP Server URL Disclosure to Admins, Owners, and Editors (#13784)
* 🥽 fix: Redact Non-User-Sourced MCP Server URLs by ACL Edit Permission

GET /api/mcp/servers and GET /api/mcp/servers/:serverName return MCP server configs to any caller with MCP-use permission. For user-sourced configs (DB-stored, UI-submitted), the URL is the caller's own and is intentionally disclosed. For non-user-sourced configs (YAML or config-tier, operator-defined), the URL and OAuth flow endpoints (authorization_url, token_url) are operator-sensitive: they can encode internal infrastructure hostnames and are not editable through the API.

This change redacts those fields on non-user-sourced configs unless the caller has edit authority on the resource, using the same ACL check (PermissionBits.EDIT) that the PATCH and DELETE routes already enforce via canAccessMCPServerResource. Callers with broad MANAGE_MCP_SERVERS capability bypass the per-resource check, matching the existing capability bypass in canAccessResource. customUserVars is intentionally not redacted: its values are UI hint metadata (title, description, sensitive), not user-supplied secrets; blanking it would give non-editor callers a Configure form with no field labels.

* 🥽 fix: Correct getResourcePermissionsMap import path + tighten redact comments

The MCP server redaction commit imported getResourcePermissionsMap from ~/server/controllers/PermissionsController, but that controller is a consumer of the helper, not its exporter. The canonical export lives in ~/server/services/PermissionService (which controllers/agents/v1.js already imports from). Fixes the runtime getResourcePermissionsMap is not a function failure on GET /api/mcp/servers and the four downstream route-spec failures whose config mocks lacked a source field and were therefore wrongly treated as non-user-sourced; mocks now reflect the real registry behavior (addServer/updateServer tag DB-stored configs with source: 'user'). Trims narrating JSDoc on the redact helpers and resorts the librechat-data-provider destructure by length.

* chore: import order

* 🥽 fix: Redact OAuth Revocation Endpoint Alongside Authorization And Token URLs

The OAuth-URL strip path only dropped authorization_url and token_url. The UserOAuthOptionsSchema in packages/data-provider/src/mcp.ts (line 146) accepts revocation_endpoint as another operator-configurable URL, and the OAuth handler uses it to revoke tokens; it can hold the same internal IdP hostnames the existing strip is trying to hide. Adds revocation_endpoint to the destructure so a non-user-sourced YAML/config MCP server config no longer leaks the revocation URL to non-editor callers. The existing strip url and oauth flow URLs spec is extended with a revocation_endpoint value to lock in the new field.

* 🥽 fix: Gate Shared DB Server URL Disclosure On ACL Edit Permission

source-driven URL disclosure was incorrect for shared DB-backed MCP servers. ServerConfigsDB.mapDBServerToParsedConfig (packages/api/src/mcp/registry/db/ServerConfigsDB.ts:465) sets source: 'user' on every DB-stored config it returns, regardless of who is accessing it. A user with only VIEW share on a DB server, or with agent-mediated access, was therefore treated by the redaction layer as if they owned the URL, and GET /api/mcp/servers disclosed the owner's URL and OAuth flow URLs to viewers who could not edit the resource.

The redaction is now driven purely by ACL edit authority: computeCanEditByServer routes every dbId-bearing config through PermissionBits.EDIT regardless of source; redactServerSecrets strips on !canEdit regardless of source. POST and PATCH controllers explicitly pass canEdit: true since both endpoints establish edit authority (POST creates the resource, PATCH is gated on the EDIT middleware). Legacy/ephemeral configs without a dbId still fall back to the source heuristic.

* 📝 docs: correct redactServerSecrets URL-disclosure comment

---------

Co-authored-by: Danny Avila <danny@librechat.ai>
2026-06-16 11:20:52 -04:00
..
__test-utils__ 🔗 feat: Add Granular Access Control to Shared Links via ACL System (#13051) 2026-06-03 14:17:17 -04:00
__tests__ 🥽 fix: Restrict MCP Server URL Disclosure to Admins, Owners, and Editors (#13784) 2026-06-16 11:20:52 -04:00
admin 🧬 feat: Add GitHub Skill Sync (#13293) 2026-06-10 21:05:54 -04:00
agents 💾 feat: Persist Context Breakdown & Branch/Total Usage Cost (#13734) 2026-06-14 10:48:07 -04:00
assistants 🧭 fix: Tighten Action OAuth Endpoint Validation (#13142) 2026-05-15 14:53:41 -04:00
files 🗜️ fix: Support Windows ZIP MIME Uploads (#13794) 2026-06-16 11:19:06 -04:00
types WIP: Update UI to match Official Style; Vision and Assistants 👷🏽 (#1190) 2023-11-16 10:42:24 -05:00
accessPermissions.js 🔗 feat: Add Granular Access Control to Shared Links via ACL System (#13051) 2026-06-03 14:17:17 -04:00
accessPermissions.sharePolicy.test.js 🔗 feat: Add Granular Access Control to Shared Links via ACL System (#13051) 2026-06-03 14:17:17 -04:00
accessPermissions.test.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
actions.js fix: Extend and Decouple MCP OAuth Flow Timeouts (#13622) 2026-06-09 17:50:02 -04:00
apiKeys.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
auth.2fa-ratelimit.test.js 🚦 fix: Guard Auth Continuation with Dedicated Limiter (#13555) 2026-06-06 14:21:28 -04:00
auth.cloudfront.test.js 🚦 fix: Guard Auth Continuation with Dedicated Limiter (#13555) 2026-06-06 14:21:28 -04:00
auth.js 🚦 fix: Guard Auth Continuation with Dedicated Limiter (#13555) 2026-06-06 14:21:28 -04:00
balance.js 🤫 chore: Quiet Repetitive Log Noise from Balance, CloudFront, and Capability Paths (#13461) 2026-06-01 20:40:16 -04:00
banner.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
categories.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
config.js feat: Immediate Conversation Title Generation (#13395) 2026-06-02 16:40:57 -04:00
convos.js 🗂️ feat: Add Private Chat Projects (#13467) 2026-06-03 15:29:18 -04:00
endpoints.js 📊 feat: Real-Time Context Window & Token Usage Tracking (#13670) 2026-06-13 19:38:28 -04:00
index.js 🧬 feat: Add GitHub Skill Sync (#13293) 2026-06-10 21:05:54 -04:00
keys.js 🔱 chore: Harden API Routes Against IDOR and DoS Attacks (#11760) 2026-02-12 18:08:24 -05:00
mcp.js 🗄️ fix: Gate Request-Scoped MCP Servers Out of Persistent Tool Cache (#13672) 2026-06-13 11:26:49 -04:00
memories.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
messages.js 📋 refactor: Attach Message Context to Langfuse Feedback Scores (#13604) 2026-06-08 15:54:01 -04:00
models.js 🛠️ refactor: Model Loading and Custom Endpoint Error Handling (#1849) 2024-02-20 12:57:58 -05:00
oauth.js 🩻 refactor: Replace Opaque OAuth Errors with Structured Failure Diagnostics (#13471) 2026-06-02 15:06:42 -04:00
oauth.test.js feat: Immediate Conversation Title Generation (#13395) 2026-06-02 16:40:57 -04:00
presets.js 🧹 chore: Cleanup Logger and Utility Imports (#9935) 2025-10-01 23:30:47 -04:00
projects.js 🗂️ feat: Add Private Chat Projects (#13467) 2026-06-03 15:29:18 -04:00
prompts.js 📁 refactor: Prompts UI (#11570) 2026-03-22 16:56:22 -04:00
prompts.test.js 📁 refactor: Prompts UI (#11570) 2026-03-22 16:56:22 -04:00
roles.js 📜 feat: Skills UI + Initial E2E CRUD / Sharing (#12580) 2026-04-25 04:02:00 -04:00
rum.js 📈 fix: Isolate RUM Telemetry Proxy Auth from App Auth (#13765) 2026-06-15 12:49:44 -04:00
search.js 🧹 chore: Cleanup Logger and Utility Imports (#9935) 2025-10-01 23:30:47 -04:00
settings.js 🎚️ feat: Per-User Skill Active/Inactive Toggle with Ownership-Aware Defaults (#12692) 2026-04-25 04:02:00 -04:00
share.js 🧼 fix: Prevent Shared Link Caching and Strengthen Log Redaction (#13561) 2026-06-06 18:40:57 -04:00
skills.js 🧬 feat: Add GitHub Skill Sync (#13293) 2026-06-10 21:05:54 -04:00
skills.tenant.test.js 🧵 fix: Preserve Upload Context Across Multipart Routes (#13072) 2026-05-11 15:46:48 -04:00
skills.test.js 🧬 feat: Add GitHub Skill Sync (#13293) 2026-06-10 21:05:54 -04:00
static.js 🧹 chore: Cleanup Logger and Utility Imports (#9935) 2025-10-01 23:30:47 -04:00
tags.js 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
user.js 📌 feat: Pin Agents and Models in the Sidebar (#10634) 2025-12-11 16:38:20 -05:00