From aa7d2afa66e925e0d7dcd35e8d43e8466c8e6141 Mon Sep 17 00:00:00 2001
From: Martin Collado <martin.collado@devoteam.com>
Date: Thu, 15 Oct 2026 21:10:50 +0200
Subject: [PATCH] fix(ui): keep runtime backend discovery under the UI prefix

---
 .../src/components/networking.test.ts         | 23 +++++++++++++++++++
 .../src/components/networking.tsx             |  5 +++-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/ui/litellm-dashboard/src/components/networking.test.ts b/ui/litellm-dashboard/src/components/networking.test.ts
index dc582da6833..0b718bfae36 100644
--- a/ui/litellm-dashboard/src/components/networking.test.ts
+++ b/ui/litellm-dashboard/src/components/networking.test.ts
@@ -1038,6 +1038,29 @@ describe("getUiConfig runtime backend discovery", () => {
     return { networking, mockFetch };
   };
 
+  it("loads static runtime configuration from the UI prefix independently of the selected worker", async () => {
+    const mockFetch = vi
+      .fn()
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ backend_url: "https://backend.example.com" }),
+      } as Response)
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ ...discoveryConfig(), server_root_path: "/services/llm" }),
+      } as Response);
+    vi.stubGlobal("fetch", mockFetch);
+    const networking = await loadFreshNetworking();
+    const { setServerRootPath } = await import("@/lib/serverRootPath");
+    setServerRootPath("/services/llm");
+    networking.switchToWorkerUrl("https://worker.example.com/worker-mount");
+
+    await networking.getUiConfig();
+
+    expect(mockFetch).toHaveBeenNthCalledWith(1, "/services/llm/ui/litellm-runtime-config.json", { cache: "no-store" });
+    expect(mockFetch.mock.calls[1][0]).toBe("https://backend.example.com/litellm/.well-known/litellm-ui-config");
+  });
+
   it("uses a normalized runtime backend URL for discovery and the management fallback", async () => {
     const mockFetch = vi
       .fn()
diff --git a/ui/litellm-dashboard/src/components/networking.tsx b/ui/litellm-dashboard/src/components/networking.tsx
index 2a2ce213216..9e68f1ad9a1 100644
--- a/ui/litellm-dashboard/src/components/networking.tsx
+++ b/ui/litellm-dashboard/src/components/networking.tsx
@@ -566,7 +566,10 @@ export const getUiConfig = async () => {
     : await (async (): Promise<string | null> => {
         try {
           // eslint-disable-next-line no-restricted-syntax -- read the UI static config before the API origin is known
-          const response = await fetch("/ui/litellm-runtime-config.json", { cache: "no-store" });
+          const response = await fetch(
+            `${serverRootPath === "/" ? "" : serverRootPath}/ui/litellm-runtime-config.json`,
+            { cache: "no-store" },
+          );
           if (!response.ok) return null;
           const runtimeConfig: unknown = await response.json();
           if (