diff --git a/README.md b/README.md
index 1e6a67d3..0d6649c3 100644
--- a/README.md
+++ b/README.md
@@ -62,5 +62,6 @@
 
 - `start.sh` is intentionally ignored by Git (`.gitignore`) so server secrets are not committed.
 - Use `start.example.sh` as the tracked template and keep real credentials in environment variables (or `.env` on the server).
-- Startup scripts run patch helpers before boot (`scripts/patch-lightningcss.mjs`, `scripts/patch-endpoint-media-scope.mjs`).
-- The media scope patch fixes a known upstream issue where file uploads can fail if the token scope is `create update delete` without explicit `media`.
\ No newline at end of file
+- Startup scripts run patch helpers before boot (`scripts/patch-lightningcss.mjs`, `scripts/patch-endpoint-media-scope.mjs`, `scripts/patch-endpoint-files-upload-route.mjs`).
+- The media scope patch fixes a known upstream issue where file uploads can fail if the token scope is `create update delete` without explicit `media`.
+- The files upload route patch fixes browser multi-upload by posting to `/files/upload` (session-authenticated) instead of direct `/media` calls without bearer token.
\ No newline at end of file
diff --git a/package.json b/package.json
index 1bb2a84e..91c4af2a 100644
--- a/package.json
+++ b/package.json
@@ -4,8 +4,8 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "postinstall": "node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs",
-    "serve": "node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node node_modules/@indiekit/indiekit/bin/cli.js serve --config indiekit.config.mjs",
+    "postinstall": "node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-files-upload-route.mjs",
+    "serve": "node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-files-upload-route.mjs && node node_modules/@indiekit/indiekit/bin/cli.js serve --config indiekit.config.mjs",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],
diff --git a/scripts/patch-endpoint-files-upload-route.mjs b/scripts/patch-endpoint-files-upload-route.mjs
new file mode 100644
index 00000000..86b4543d
--- /dev/null
+++ b/scripts/patch-endpoint-files-upload-route.mjs
@@ -0,0 +1,52 @@
+import { access, readFile, writeFile } from "node:fs/promises";
+
+const candidates = [
+  "node_modules/@indiekit/endpoint-files/views/file-form.njk",
+  "node_modules/@indiekit/indiekit/node_modules/@indiekit/endpoint-files/views/file-form.njk",
+];
+
+const oldCode = "xhr.open('POST', endpoint);";
+const newCode = "xhr.open('POST', window.location.pathname);";
+
+async function exists(path) {
+  try {
+    await access(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+let checked = 0;
+let patched = 0;
+
+for (const filePath of candidates) {
+  if (!(await exists(filePath))) {
+    continue;
+  }
+
+  checked += 1;
+  const source = await readFile(filePath, "utf8");
+
+  if (source.includes(newCode)) {
+    continue;
+  }
+
+  if (!source.includes(oldCode)) {
+    continue;
+  }
+
+  const updated = source.replace(oldCode, newCode);
+  await writeFile(filePath, updated, "utf8");
+  patched += 1;
+}
+
+if (checked === 0) {
+  console.log("[postinstall] No endpoint-files upload template files found");
+} else if (patched === 0) {
+  console.log("[postinstall] endpoint-files upload route already patched");
+} else {
+  console.log(
+    `[postinstall] Patched endpoint-files upload route in ${patched} file(s)`,
+  );
+}
diff --git a/start.example.sh b/start.example.sh
index 0b03397c..16743f42 100644
--- a/start.example.sh
+++ b/start.example.sh
@@ -30,5 +30,6 @@ export NODE_ENV="${NODE_ENV:-production}"
 # Ensure runtime dependency patches are applied even if node_modules already exists.
 /usr/local/bin/node scripts/patch-lightningcss.mjs
 /usr/local/bin/node scripts/patch-endpoint-media-scope.mjs
+/usr/local/bin/node scripts/patch-endpoint-files-upload-route.mjs
 
 exec /usr/local/bin/node node_modules/@indiekit/indiekit/bin/cli.js serve --config indiekit.config.mjs